1974 Firebird Engines
| RPO Code | UPC Code | Type | Source | Displ cid | Bore & Stroke | Carb | Comp | HP/RPM Net | Torque/RPM | VIN | Engine Block code(s) | Trans RPO | UPC | Transmission | Axle | Opt Axle | Base | Esprit | Formula | Trans Am | Notes |
| 35D | L22 | Inline 6 | Chevrolet | 250 | 3.875 x 3.531 | 1 bbl | 8.2:1 | 100@3800 | 175@1600 | D | CJA, CJB, CJC | 36B | M12 | 3 Speed Manual (Floor Shift) | 3.08 | | S | n/a | n/a | n/a | Not available with Air Conditioning |
| 36K | M38 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | A | n/a | n/a | n/a |
| 35M | L30 | V-8 | Pontiac | 350 with single exhaust (Esprit) | 3.875 x 3.75 | 2 bbl | 7.6:1 | 155@4000 | 275@2000 | M | WA | 36B | M12 | 3 Speed Manual Floor Siift | 3.08 | 3.42 | A | S | S | n/a | |
| 36E | M20 | 4 Speed Wide Ratio Manual Transmission (Floor Shift) | A | A | A | n/a |
| 350 with dual exhaust (Formula) | 175@4400 | 290@2400 | N | M21 | 4 Speed Close Ratio Manual Transmission (Floor Shift) |
| YA, ZA, AA | 36K | M38 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | 2.73 | 3.08 | A | A | A | n/a |
| 35R | L65 | V-8 | Pontiac | 400 with single exhaust | 4.125 x 3.75 | 2 bbl | 8.0:1 | 170@3600 | 315@2000 | R | AD, AH, YF, YH, ZJ, ZK | 36L | M40 | 3-Speed Turbo Hydramatic Transmission (Turbo 400) | 3.08 | | n/a | A | A | n/a | Formula includes dual exhaust. |
| 190@3600 | P | n/a | n/a | A | n/a |
| 35S | L78 | V-8 | Pontiac | 400 with single exhaust | 4.125 x 3.75 | 4 bbl | 8.0:1 | 230@4000 | 330@3200 | S | Y3, WR, WT | 36E | M20 | 4 Speed Wide Ratio Manual Transmission (Floor Shift) | 3.42 | | n/a | n/a | A | S | Formula and Trans Am include dual exhaust. |
| M21 | 4 Speed Close Ratio Manual Transmission (Floor Shift) |
| 400 with Dual Exhaust (Option N10) | T | A3, YL, YM, YT, AT, YZ, ZS, ZT | 36L | M40 | 3-Speed Turbo Hydramatic Transmission (Turbo 400) | 3.08 | | n/a | n/a | A | A |
| 35W | L75 | V-8 | Pontiac | 455 | 4.15 x 4.21 | 4 bbl | 8.0:1 | 250@4000 | 380@2800 | Y | A4, Y9, Z4, YY, AU, YW, ZU, ZW | 36L | M40 | 3-Speed Turbo Hydramatic Transmission (Turbo 400) | 3.08:1 | | n/a | n/a | A | A | |
| 35X | LS2 | V-8 | Pontiac | 455 Super Duty | 4.15 x 4.21 | 4 bbl | 8.4:1 | 290@4000 | 395@3600 | X | W8 | 36E | M20 | 4 Speed Wide Ratio Manual Transmission (Floor Shift) | 3.42 w/o AC, 3.08 w AC | | n/a | n/a | A | A | |
| Y8 | 36L | M40 | 3-Speed Turbo Hydramatic Transmission (Turbo 400) | n/a | n/a | A | A |
1974 Firebird Transmissions
| RPO Code | UPC Code | Type | Usage | Codes | Base | Esprit | Formula | Trans Am | Notes |
| 36B | M12 | 3 Speed Manual Transmission, Floor Mounted | L22 250 cid Inline 6 Cylinder | | S | n/a | n/a | n/a | |
| L30 350 cid V8 Floor Shift | A | S | S | n/a |
| 36E | M20 | 4 Speed Wide Ratio Manual Transmission (Floor Shift) | L30 350 cid V8 | | A | A | A | n/a | The GM made Muncie M20 was replaced with the Borg Warner M21 in late 1973. |
| LS2 Super Duty 455 | n/a | n/a | A | A |
| L78 400 cid V8 4bbl | n/a | n/a | A | S |
| 36K | M38 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | L22 250 cid Inline 6 Cylinder | | A | n/a | n/a | n/a | |
| L30 350 cid V8 | A | A | A | n/a |
| 36L | M40 | 3-Speed Turbo Hydramatic Transmission (Turbo 400) | L65 400 cid V8 2bbl | | n/a | A | A | n/a | |
| L78 400 cid V8 4bbl | n/a | n/a | A | A |
| L75 455 cid V8 4bbl | n/a | n/a | A | A |
| LS2 Super Duty 455 | n/a | n/a | A | A |
1974 Engines
Where to find the Engine ID stamping
Chevrolet made Inline 6 Cylinder Engine (Typical)
Pontiac V-8 Engine (Typical)
The 1974 Pontiac Super Duty 455 Engine
Examples shown on this page consist of scanned images or reproduction artwork that can not be faithfully reproduced on a computer screen. Illustrations are for example only. Consult with your vendors offerring reproduction
parts for their historical accuracy.