Sorry about to get in here. "Yes, the 350 looks pretty much the same as the 403. Infact, to get better performance out of an Olds 403, people say you can put on the 350 heads."
If you do that, is there others things to change also, or it will bolt on like that.
(its because, i can buy a 350 olds at the moment from somebady i now, for a very interesting price, it had heads 4A on it)
Can plaese somebody tell me that of it works and if there other things to do as well.
Regards Albert