What would be the best carb for seat of the pants feel?
Holley street avenger 670 or holley DP 650?

The 650 dp but your combo needs to matched,intake cam gears. smile.gif

I would do the Street Avenger unless you have a really stout motor.

heres my motor
350.020 over and decked .010
9.73.1 speedpros
edelbrock rpm heads
rpm manifold
3;73 gears
xe274 cam