Buick 350- Olds 350?

[76skylark]

I have a 76 Skylark and was wondering if anyone new about putting a Chevrolet 350 or Olds 350 in place of the 231. I have had a hard time locating a Buick 350, but I found several Chevrolet & Olds 350's. Do the engines vary?

 

[theoldguy]

The Chevy engine will not fit your tranny, but the Olds will.

 

[76skylark]

Thanks for the info!!!!!!