Here you will find intake manifold casting numbers for the popular Chevy V-8's. Due to the fact that there are literally hundreds of different intakes, they are not all listed. Time and resources limit listing all of them. Simply put, the casting number listed on a school bus from 1980 just isn't what collectors or car clubs are looking for.
These Chevy intake manifolds are either made from cast iron or aluminum. A huge number of high-performance engines warranted aluminum manifolds that started with the dual 4 barrel intake in 1956. Through the mid '70s aluminum intakes were also installed on regular performance engines that saw their way into many cars and trucks. There were many 2 barrel aluminum intakes installed on the 262 and 305 engines as well. Many of the aluminum intake manifolds were manufactured by outside contractors such as Winters Industries in Ohio. Their trademark was easy to spot and featured what looked like a snowflake with a "W" in the center of it. This mark is also used to help identify authentic factory GM aluminum engine parts. Please note that the Weiand Performance intake manifold is not identified this way.
Factory Chevy manifolds are marked with casting date codes that are alphanumeric. They start with a letter indicating the month, followed by 1 or 2 numbers that determine the month, then one more number the indicates the year of the decade. A little further inspection may be required to determine which decade. An oil filler tube would tell you that the intake manifold was produced in the 60's. Spread bore carburetor flanges made their first appearance in 1967. Here is an example, A-11-7. The A tells us the first month of the year, 11 tells us the day 7 tells us the year. Since our manifold is a spread bore with an oil filler tube then we know we have a manifold from January 11,1967. some date codes will give a 2 digit number for the year, this generally happened in the late '50s
Oil filler tubes were no longer used after 1968. If the manifold has an EGR mounting boss then it tells us that the manifold was made in 1973 or later. Temperature sending units were mounted via threaded hole into the water passageway at the front of Chevy intakes until late 68. After that, they mounted to a threaded boss in the cylinder head. This changed again in the mid '70s. 68 and earlier alternators were mounted to the left side of the engine and featured a threaded hole in the left front of the intake manifold to accommodate the mounting brackets. This changed for the 1969 model year when the alternator was mounted on the right side with a bracket bolted to a stud threaded to the right side of the thermostat housing. During the early '70s the factory started to install the temperature sending unit back to the intake manifold. This required the movement of the thermostat housing and a new mounting bracket boss on the right front supporting the alternator bracket.
The best way to determine the year of the manifold is to check the casting number itself. Seven digit numbers generally belong to the vintage models and follow a rough sequence. The mid 70's it's not unheard of to see 6 digit numbers and then eight-digit numbers starting with 14 were used on the later models. Casting numbers for the aluminum intake manifolds are generally hidden under the heat shield on the underside of the manifold. The numbers on top can become almost impossible to read.
Sometimes removing the factory heat shield is required to properly identify an original Chevrolet Aluminum Intake
Small Block Chevy intakes don't have the four bolt holes on the outside of the intake runners.
This intake is from a 348/409 Mark IV big block. Both styles of Big Block Chevy intakes have 4 bolt holes outside of the intake runner.
Many 348/409 applications featured slotted holes at this location.
1968 was the last model year for the oil filler tube on the intake manifold. Note the tapped mounting boss for the alternator bracket to the right of the filler tube.
Beginning in 1969 the intake manifolds had no visible alternator bracket, mounting boss. The factory stretched the mounting bracket and bolted it to the thermostat housing.
After a few years, small blocks were given a new cast boss with a vertical threaded stud. Note the grid pattern in this aluminum intake. This pattern first appeared in the mid '70s telling you right away that it is not from any of the 50's or 60's performance engines.
By far the most common carburetor used on Chevy engines was the Quadrajet or Q-jet. These manifolds are easily spotted and I.D. by the spread bore mounting flange.
The "Winters" logo is very prominent on the aluminum intakes from the 60's high-performance applications.
These Chevy intake manifolds are either made from cast iron or aluminum. A huge number of high-performance engines warranted aluminum manifolds that started with the dual 4 barrel intake in 1956. Through the mid '70s aluminum intakes were also installed on regular performance engines that saw their way into many cars and trucks. There were many 2 barrel aluminum intakes installed on the 262 and 305 engines as well. Many of the aluminum intake manifolds were manufactured by outside contractors such as Winters Industries in Ohio. Their trademark was easy to spot and featured what looked like a snowflake with a "W" in the center of it. This mark is also used to help identify authentic factory GM aluminum engine parts. Please note that the Weiand Performance intake manifold is not identified this way.
Factory Chevy manifolds are marked with casting date codes that are alphanumeric. They start with a letter indicating the month, followed by 1 or 2 numbers that determine the month, then one more number the indicates the year of the decade. A little further inspection may be required to determine which decade. An oil filler tube would tell you that the intake manifold was produced in the 60's. Spread bore carburetor flanges made their first appearance in 1967. Here is an example, A-11-7. The A tells us the first month of the year, 11 tells us the day 7 tells us the year. Since our manifold is a spread bore with an oil filler tube then we know we have a manifold from January 11,1967. some date codes will give a 2 digit number for the year, this generally happened in the late '50s
Oil filler tubes were no longer used after 1968. If the manifold has an EGR mounting boss then it tells us that the manifold was made in 1973 or later. Temperature sending units were mounted via threaded hole into the water passageway at the front of Chevy intakes until late 68. After that, they mounted to a threaded boss in the cylinder head. This changed again in the mid '70s. 68 and earlier alternators were mounted to the left side of the engine and featured a threaded hole in the left front of the intake manifold to accommodate the mounting brackets. This changed for the 1969 model year when the alternator was mounted on the right side with a bracket bolted to a stud threaded to the right side of the thermostat housing. During the early '70s the factory started to install the temperature sending unit back to the intake manifold. This required the movement of the thermostat housing and a new mounting bracket boss on the right front supporting the alternator bracket.
The best way to determine the year of the manifold is to check the casting number itself. Seven digit numbers generally belong to the vintage models and follow a rough sequence. The mid 70's it's not unheard of to see 6 digit numbers and then eight-digit numbers starting with 14 were used on the later models. Casting numbers for the aluminum intake manifolds are generally hidden under the heat shield on the underside of the manifold. The numbers on top can become almost impossible to read.
Casting numbers are generally found behind the carburetor flange in front of the distributor hole on the cast iron manifolds.
The firing order number has often confused with the casting number. Firing orders are clearly marked.
Sometimes removing the factory heat shield is required to properly identify an original Chevrolet Aluminum Intake
Small Block Chevy intakes don't have the four bolt holes on the outside of the intake runners.
This intake is from a 348/409 Mark IV big block. Both styles of Big Block Chevy intakes have 4 bolt holes outside of the intake runner.
Many 348/409 applications featured slotted holes at this location.
1968 was the last model year for the oil filler tube on the intake manifold. Note the tapped mounting boss for the alternator bracket to the right of the filler tube.Beginning in 1969 the intake manifolds had no visible alternator bracket, mounting boss. The factory stretched the mounting bracket and bolted it to the thermostat housing.
After a few years, small blocks were given a new cast boss with a vertical threaded stud. Note the grid pattern in this aluminum intake. This pattern first appeared in the mid '70s telling you right away that it is not from any of the 50's or 60's performance engines.
By far the most common carburetor used on Chevy engines was the Quadrajet or Q-jet. These manifolds are easily spotted and I.D. by the spread bore mounting flange.
The "Winters" logo is very prominent on the aluminum intakes from the 60's high-performance applications.
Small Block Chevy Intake Manifold Casting Numbers
| Casting # | CID | Year | Model Applications | Comments |
|---|---|---|---|---|
| 340261 | 350 | 74-76 | Passenger,Camaro,Chevelle,Nova | 4 BC,cast iron,w/egr |
| 340266 | 305-350 | 73-81 | Passenger,Camaro,Malibu | 2 BC,cast iron.w/AC |
| 346249 | 305-350 | 76-82 | All 155,165, 205 HP | cast iron,Q-jet w/egr |
| 346250 | 305-350 | Late Model | All | 4 BC,cast iron,Q-jet,no egr |
| 346260 | 267,305,350 | 73-77 | Passenger,Camaro,Malibu, Monte Carlo |
2 BC,cast iron,w/egr,w/AC |
| 373598 | 305 | 78-80 | Malibu, Monte Carlo | 2 BC,Aluminum,w/egr |
| 458520 | 305-350 | Late Model | All | 4 BC,Aluminum,Q-jet,w\egr |
| 1403372 | 305-350 | 80-82 | Camaro,Corvette | Cross Fire F.I. |
| 3704790 | 265 | 55 | Passenger | 2 BC |
| 3711348 | 265 | 55 | Passenger,Corvette | 4 BC,cast iron |
| 3728725 | 265 | 56 | Corvette | 2x4 BC,aluminum 225 HP first design |
| 3731394 | 265 | 56 | Corvette,Passenger | 2x4 BC,aluminum,225 HP second design |
| 3731398 | 283 | 57 | Corvette,Passenger | 4 BC,iron 220 HP,WCFB or 4-jet |
| 3732880 | 265,283 | 57 | Passenger | 2 BC |
| 3735444 | 265 | 56 | Passenger | 2 BC |
| 3735448 | 265 | 56 | Corvette | 4 BC,cast iron,210 HP |
| 3737109 | 265 | 56 | Passenger | 4 BC |
| 3739653 | 283 | 57-61 | Corvette,Passenger | 2x4 BC,aluminum,250 and 270 HP |
| 3741193 | 283 | 57 | Passenger | Fuel Injection |
| 3746826 | 265-283 | 57-63 | Passenger | 2 BC,cast iron |
| 3746829 | 283 | 57-61 | Corvette,Passenger | 4 BC,cast iron,WCFB or 4-jet |
| 3783244 | 283-327 | 62-63 | Corvette,Passenger | cast iron,Standard & 250 HP,WCFB or 4-jet |
| 3794129 | 327 | 63 | Corvette | 4 BC,Aluminum, 340 HP |
| 3795397 | 327 | 62 | Corvette | 4 BC,Aluminum, 340 HP |
| 3799349 | 327 | 62-64 | Passenger,Corvette | 4 BC,hi-perf,Carter AFB |
| 3826810 | 327 | 63-65 | Corvette | Fuel Injection |
| 3837109 | 265-283 | 56 | Corvette,Passenger | 4 BC,iron,210 HP.WCFB or 4-jet |
| 3840905 | 283 | 64-65 | Passenger,Chevelle,Truck, Chevy II |
2 BC,cast iron,w/oil filler tube |
| 3844457 | 327 | 64-65 | Pass,Corvette,Chevelle,Chevy II | 4 BC,iron,250 HP WCFB or 4-jet |
| 3844459 | 327 | 63-65 | Pass,Corvette,Chevelle,Chevy II | 4 BC,cast iron,Carter AFB |
| 3844461 | 327 | 64 | Corvette | 4 BC,Aluminum,365 HP |
| 3866922 | 283-327 | 62-65 | Passenger,Chevelle,Chevy II | 4 BC,cast iron,WCFB or 4-jet |
| 3872783 | 283-327 | 66-68 | Pass,Corvette,Chevelle,Chevy II, LT Truck |
4 BC,cast iron,Holley |
| 3877652 | 283 | 66-67 | Passenger,Chevelle | 2 BC No A/C |
| 3890490 | 327 | 66-67 | Corvette,Chevy II | 4 BC Aluminum,350 HP |
| 3905393 | 327-350(67) | 66-68 | Passenger,Camaro,Chevelle,Nova | 4 BC,cast iron,Q-jet |
| 3910601 | 327 | 67-68 | Chevelle,Camaro,Nova | 2 BC,cast iron w/o A/C |
| 3916313 | 307-350 | 69-70 | ALL | 2 BC,cast iron |
| 3917610 | 302 | 67-68 | Z/28 Camaro | 4 BC, Aluminum 290 HP |
| 3919801 | 307 | 68 | Passenger, Chevelle | 2 BC,cast iron,w/o A/C |
| 3919803 | 327 | 68 | Pass,Chevelle,Corvette,Camaro,Nova | cast iron,Q-jet |
| 3927183 | 307-327 | 69 | Pass,Camaro,Chevelle,Nova | 2 BC,cast iron,no oil filler |
| 3927184 | 350 | 68 | Pass,Chevelle,Corvette,Camaro,Nova | 4 BC,cast iron,Q-jet,no A/C |
| 3932472 | 302 | 69 | Z/28 Camaro | 4 BC,Aluminum Hi Rise |
| 3941126 | 302 | 68-69 | Z/28 Camaro | Cross Ram Bottom |
| 3941130 | 302 | 67-69 | Z/28 Camaro | Cross Ram Lid |
| 3959594 | 350 | 71-72 | Corvette, Z/28 Camaro | LT1 Aluminum 255 & 330 HP |
| 3965577 | 350 | 69-70 | Passenger,Corvette,Camaro,Nova | 4 BC,cast iron,300 & 350 HP,no oil fill |
| 3972110 | 350 | 70 | Corvette, Z/28 Camaro | LT1 Aluminum Hi Rise,370 HP |
| 3972114 | 350 | 72 | Z/28 Camaro | 4 BC, Aluminum Hi Perf |
| 3972116 | 350 | 70 | Z/28 Camaro | 4 BC |
| 3972361 | 350 | 70-71 | Z/28 Camaro | 4 BC, Aluminum Hi Perf |
| 3973465 | 307,327,350 | 69-71 | Pass,Camaro,Chevelle,Nova | 2 BC,No Alt Mount,no A/C |
| 3973469 | 350 | 71 | Passenger,Corvette,Camaro | 4 BC,cast iron,Q-jet |
| 3997771 | 350 | 73 | Pass,Nova,Camaro,Z/28,Chevelle | 4 BC,cast iron,w/egr |
| 6263751 | 350 | 72 | Corvette | 4 BC,cast iron,200 HP |
| 14007374 | 305 | 79-80 | Passenger | 2 BC,Aluminum,w/egr |
| 14057053 | 305-350 | Late Model | Passenger,Camaro,Truck | 4 BC,Aluminum.Q-jet.w/egr |
Big Block Chevy Intake Manifold Casting Numbers
| Casting # | CID | Year | Model Applications | Comments |
|---|---|---|---|---|
| 3732757 | 348 | 58-62 | 4 BC,cast iron | |
| 3749948 | 384 | 58-61 | 3x2 BC,cast iron | |
| 3753748 | 348 | 60-61 | 2x4 BC,Aluminum,Hi Perf | |
| 3760436 | 348 | 58-59 | 4 BC,wo/HL Cam | |
| 3767579 | 348-409 | 61 | ||
| 3770084 | 348 | 58-59 | 4 BC,w/HL Cam | |
| 3772265 | 348 | 60-61 | 4 BC | |
| 3780540 | 348 | 58-59 | 4 BC,Hi-Perf,Aluminum | |
| 3797775 | 348 | 59-60 | Hi-Performance | |
| 3797776 | 409 | 61 | ||
| 3813678 | 409 | 62-63 | Standard Performance | |
| 3814881 | 409 | 62-64 | 2x4 BC, Aluminum, Hi-Perf | |
| 3830623 | 409 | 63 | Z11,435 HP,Hi-Perf | |
| 3830831 | 409 | 63 | Cast Iron,4 BC,340 HP | |
| 3844463 | 409 | 64-65 | 4 BC 400 HP | |
| 3834464 | 409 | 64-65 | w/o Hi Perf,cast iron, 4 BC,340 HP | |
| 3844472 | 348-409 | 62-65 | Truck | 4 BC,cast iron |
| 3856289 | 396 | 65 | Passenger | Q-jet,cast iron,oval port,325 HP |
| 3866948 | 396-427 | 65-68 | Passenger,Chevelle,Corvette (427,66-67),Camaro(396,67-68) | Cast Iron,Oval Port,Holley,390 HP |
| 3866963 | 396 | 65 | Corvette,Z16 Chevelle,Passenger | Aluminum,425 HP,Hi Performance |
| 3883948 | 396-427 | 66-68 | Passenger,Chevelle, Corvette,(427,67),Camaro(396,66-68) | Cast Iron,Oval Port,390 HP,Q-jet |
| 3885069 | 396-427 | 66-68 | Camaro,(396,67-68) Corvette,(427,66-68) Passenger(396-427,66-68) Chevelle(396-427,66-68) Nova(396,68) | Aluminum L88 (427),Hi Perf,SQ Port,Holley,425 HP |
| 3886093 | 427 | 67 | Corvette | Aluminum,L88,Hi Perf |
| 3886848 | 396 | 68 | ||
| 3894374 | 427 | 67 | Corvette | Aluminum 435 HP,Hi Perf |
| 3894382 | 427 | 67 | Corvette | Aluminum 400 HP,3x2 BC,Oval Port |
| 3919849 | 427 | 68 | Corvette | Aluminum,390 HP,Oval Port |
| 3919850 | 427 | 68 | Corvette | Aluminum,400 HP,3x2 BC,Oval Port |
| 3919852 | 427 | 68 | Corvette | Hi-Perf, Aluminum, 435 HP,early 68,3x2 BC |
| 3931067 | 396-427 | 69 | All Models | Q-jet,Oval Port,Cast Iron,325,350,390 HP |
| 3933163 | 396-427 | 68-69 | All Models,69 COPO Camaro and Chevelle | Alum, SQ Port,Hi Perf, Also late 68 |
| 3933198 | 427 | 68-69 | Corvette(L88),Camaro(ZL1) | SQ Port,Aluminum,L88,ZL1,Hi-Perf |
| 3937793 | 427 | 68 | Corvette | Aluminum 390 HP, Oval Port |
| 3937795 | 427 | 68-69 | Corvette | Aluminum 400 HP3x2 BC,Oval Port |
| 3937797 | 427 | 68-69 | Corvette | Aluminum,435 HP,Hi-Perf,3x2 BC,Oval Port |
| 393841 | 402-454 | 73-75 | Pass, Chevelle, Corvette, Lt Truck | Q-jet, Cast Iron, Oval Port |
| 3947801 | 427 | 69 | Corvette | Aluminum 390 HP, Oval Port |
| 3955287 | 402-454 | 70-71 | Nova(402,70) Chevelle(402-454,70-71) Passenger(454,70-71) Camaro(402,70-71) Corvette(454,70-71) | Q-jet,Cast Iron,Low Rise,Oval Port,LS3,LS4,LS5 |
| 3962300 | 396 | 69 | Passenger | 2 BC, Cast Iron |
| 3963569 | 402-454 | 70-71 | Camaro(402,70) Nova(402,70) Chevelle(454,70-71) Corvette(454,71) | SQ Port,Aluminum,Hi-Perf,375,425,450 HP,LS6,low rise |
| 3967474 | 454 | 71 | Corvette | SQ PortAluminum,425 HP,LS6, low rise |
| 3969802 | 454 | 70 | Corvette | Cast Iron,390 HP Low Rise |
| 6263753 | 400,402,454 | 72 | Corvette(454) Camaro(402) Chevelle(400,402,454) | Cast Iron,Low Rise,Oval Port,Q-jet,LS3,LS5, 270,390 HP |
| 6269318 | 396-427 | 68-69 | SQ Port Aluminum Hi Rise | |
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