350 HO Codes for 1968
Short answer: The engine, transmission, and component codes for a 1968 Firebird 350 H.O. are below.
| Engine | Code | Output |
|---|---|---|
| 350 H.O. Manual | WK | 320 hp, 10.5:1 |
| 350 H.O. Automatic | YM | 320 hp, 10.5:1 |
| Transmission | Maker | Code |
|---|---|---|
| 3-speed standard (column shift) | Saginaw | RJ |
| 3-speed standard (floor shift) | Dearborn | DB |
| 4-speed optional | Muncie | FX |
| 2-speed automatic | ST-300 | MB |
| 2-speed automatic (w/ A/C) | ST-300 | MC |
Other components: Cylinder heads “18” · Carburetor: MT 7028269 / AT 7028266 · Intake manifold (same as all 4-bbl): 9790140 · Exhaust manifolds (same as Std. & 400): 9794320 RH / 9777755 LH · Distributor: MT 1111447 / AT 1111282.
For reference, 2,087 400 H.O. Firebirds were made in 1968; the 350 H.O. count is likely similar or a bit lower.
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Content last modified: June 13, 2026 at 10:06 am
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