Customs Olds Motors

Not knowing alot about Olds motors. I have some 303 stuff (valve covers/manifold) and would like to know what other size motors I can use them on,,,if any. Your responses would be greatly appreciated

 

I believe that the valve covers will interchange with the 324's ('49-'56); I believe the later covers have perimeter hold down bolts rather than central mounting studs. As to intake manifolds, I believe they will bolt on, but Oldsmobile changed their intake port size several times in the 303/324 era and you could end up with serious port mismatches.

 

Here you go, this should keep you busy for a while
https://www.jalopyjournal.com/forum/threads/rocket-oldsmobile-v8-information-compiled.715390/
Early 303 intake manifolds will fit 324’s with up to #8 heads after that no bueno.

 

Here's another big thread:
https://www.jalopyjournal.com/forum...o-end-all-other-posts-lasalle-related.149650/

 

The heads and intake manifold are '49-'53. They can be used on '54-'56 engines if used in unison, although that would be a step down from the later heads, which have larger ports.