I would suggest either:
A Police Interceptor manifold.
Or a "S" or Cobra Jet manifold.

Those failing a Blue Thunder.

If those are too hard to find or expensive, a Performer RPM.

The Street Avenger 670 (there is also a Truck Avenger) is nice and would be plenty of carb. The 750 CFM model 3310C is cheaper though.

If it is a 2WD hooker has a bolt on system that works with their competition series headers and 2 turbo mufflers.