Holley vs. Eddy 273

I am thinking of pulling the Eddy 600 off my commando 273 and using it for my 318 71 swinger . I would like to put a bigger Holley on the 273 but don't want to over carb the motor. It is a 65 commando motor with the 10.5/1s and was rebuilt that way with a bigger cam, headers and 2 1/2 exhaust. I will be using an Eddy D4B intake. How big should I go? Specs for the 66 D-Dart called for a holley 4160 but not sure of the size.

Cam specs Solid comp cams 20-246-1, 468 lift, 270 duration, 901-16 springs, stock valves.