Find two 650-700-750 matching DPs to use as donors to build you own custom HP 750's. (proform HP body kit)
This will build the most power and response once dialed in.
Or two edelbrock 1407's.. The vacuum carbs 600-750-780 will need a ton of rework to get them to do more than run. But they will run on it.
Small side hung bowls allow inline mounting. Or secondary metering plates allow inline mounting with centerhung bowls (like the 660's x2).
Every carb pair you end up with will need fine tuning to get them right. A AFR gauge and a vacuum gauge and lots of drive testing and tuning. Its up to you as to how well it works. (effort)
A a pair of the 660 centersquirters are the closest to being correct out of the box.
Edelbrocks can work very well. The 750 would be my choice and recomendation if you go that route.
Last edited by F-BIRD'88; 01-02-2013 at 08:51 PM.