Best intake manifold and carburetor for a 273

I believe anybody can figure out I'm sarcastic talkin about a Super Victor and .750 roller for a 273. That said, my serious recommendation would be a stock Commando 4 barrel intake and a nice modern Edelbrock 500 AVS. That's be hard to beat, IMO.
my only gripe on the commando intake is that those seem to be entering "LD territory" price wise and for that money i think there's much better pieces out there. it also limits you to a square bore (without an adaptor, but then hood clearance could be an issue) if that's an important factor.

i think it'd be fine for the application, but there's better options imo