The set of # 48 s I have arent what you might think. I CCed them and they are at 96 CC s. Not what I expected to be on a 350...but thats what it was.
I have plenty of pontiac ...engines - heads etc. LOL
I just bought a 1969 428 . Wish I had found it before I bought the 400, or the 389...or .....
To The OP ....shove a Comp cams XE 256 in that bad boy and rework that 2GC rochester a little. They can be made to run 500 CFM which is right for a stock 350. Dual exhaust with a crossover would be a definite plus also.
You would be suprised.
That would be on target for a budget street ride.
If you want NORS Pontiac engine parts ...I know a guy in Lansing, mi. He has 4 warehouses full of nors stuff for all makes.