anybody know if a 1955 oldsmobile 324 engine will fit in a 1950 oldsmobile with a 303 without having do any mods.
Thank you.

 

You will have to use the '50 Flywheel, bell housing, and starter in order to bolt up to the '50 trans.
'50 exhaust manifolds should bolt up to '55 heads.
Depending on which carb and intake manifold are used, you may need to adapt throttle linkage.
Engine mount should fit.

 

That sounds like great news. I should be able to do that then.
I was worried about the mounts and transmission bolting up.
Thank you very much sir.

 

Exhaust manifolds do not interchange 303 to 324. The 55 stock manifolds should fit OK around steering box with the 324. Dual exhaust would be custom anyway. Crossover pipe OK if using single exhaust. Down pipe right side might need some fudging for single. If you replace the motor mounts, be sure you obtain the correct for car year types and they match what you have, if any.