Which carb would you get?

Jack,

That 650 speed demon may be just the ticket if the price is right. I know it seems small, but you'd only really lose HP above 5000 rpm and the driveablity would be awesome.

The speed demons have an idle air bypass screw, so can avoid drilling the throttle butterflys when running a big cam. Be sure to check out their website on how to adjust it. Barring that I would go with a 750 speed demon vacuum or mechanical. Barry Grant makes some great carbs. Kinda like how Holley should've done it!