Until a Pontiac enthusiast stumbles across this thread or a mod decides to change the title to something more specific, here's something to get you started:
Just as a suggestion, next time try to make your thread title more specific like "350 Pontiac" or something the like. The fact that it only says "350 ???" is probably making many people believe that this is a thread about a SBC 350, which is obviously the most common and popular engine of this displacement.