Henry is right, it's hard to beat a very well setup carb and intake system for the street. My choice for performance is ALWAYS a well setup Holley HP.
BUT, a poor carb setup to EFI is like apples and footballs. The last retro we did was a 400 SBC from an Edelbrock carb and intake to a TPI controlled by a F.A.S.T. EFI system. The customer was EXTREMELY pleased with how it ran.
The trouble though with the stock TPI is it's not going to make horsepower. This application was in a truck with aftermarket runners. Still not a HP king at all but it made 450 ft/lbs of torque under 3000 RPM on the dyno. That's SAE corrected as well. Not foo foo magazine numbers.