Bore, stroke, displacement and compression for all 2 GMC 350ci engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 350 ci |
|---|---|
| Cylinders | 8 |
| Bore | 4.001" |
| Stroke | 3.484" |
| Advertised power | 155–255 hp |
| Years | 1970–1995 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| LS9 | 350 ci | 4.001" × 3.484" | — | 155–255 |
| L05 | 350 ci | — | — | 200–210 |
1 of 2 are oversquare — bore larger than stroke, which favours revs over low-end torque.
Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.