I`m not familiar with pontiac and have yet to find a good image of a 307 they put in pontiac.
So thinking they may resemble the rest of the lineup and seeing they have a different rotation, I figured it was a valid question. We learn something new every day.
All I know is if I owned a 72 307 ventura, I would`nt go in the parts store and tell them I have a 72 olds. Back to the backfire...
