I didn't do enough research before rebuilding my 350 and had the work done by a shop that didn't know enough about Pontiac's so the advise I did get was not as solid as I hopped for. Admittedly all rookie mistakes now I need advise on how to correct what I have. I think I have some decent parts (not heads) I just need to make some key changes to pull it together..

The car starts and runs very well. it just doesn't pull like it should (probably the low compression or the big cam or both) . Although the carb is big I assume it is adjusted well because the plugs have good color.

What I am looking for is a weekend driver with some good power and decent mileage (doesn't need to be great)
I'm thinking changing the heads or the cam or both. If I change the cam I' thinking 066 or 067 pontiac type cam (I know there a plenty good new grinds to consider) . If I go with heads Im thinking 17, 18, or 46's. I did find a set of 67 143's heads, can I use these on my 1970 350?

Thanks in advance, be nice

Build Spec:
1969 Firebird
1970 350, 30 over
Deck not zero'd out
068 cam
11 heads, 93cc, pressed studs
8.3 compression
Doug's headers and duel exhaust
2R4 Trans with OD
2400 Stall
800 Qjet
3.73 posi
B& M quick silver