how large of a carb can perform well on stock 273 commando ?

clifftt said
Doesn't Holley still make a 600 dp? Anybody try one of those?

19 of them. I'm not a fan of mechanical chokes so here are 15 carbs. They are either milled air horns like I run or electric chokes.

http://www.summitracing.com/search/...lt&SortOrder=Ascending&tw=carb&sw=Carburetors