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

I had an old 6610 Holley DP on my 71 318 Dart. I even removed the choke horn on it. That thing started whether it was -20 with snow or 100* with 90% humidity out in IL ....pump it twice and turn key...EVERY TIME! I was 18 and it was my daily driver at the time :) Purchased the same model for my 318 build going into the Valiant.