I would propose the idea of using a 600 holley 4 bbl double pumper vs the 500 2 bbl.
Reasons:
1. smaller primary blades than the 500 (500's are as big as a 750 4 bbl)better for drivability.
2. More tunability
I used the 500 2bbl on the dyno 250 only because I did not own a small double pumper carb.
Last edited by tlowe #1716; 11/22/12 12:38 PM.