Here's the oddball recommendation of the bunch -

305 cu in Daily Driver: 500 cfm rating max, small primaries/large secondaries, vacuum secondaries or those controlled by airflow. - Not linkage controlled that can be forced open at low rpm. Manifold rated for mid-rpm at best, not high. In the old days this would be dual plenum rather than single. If you should mismatch the two components or mismatch them to the existing engine, the engine won't do anything particularly well. This doesn't answer your brand question, but brand isn't always the way to go except as a matched pair for convenience. Call or e-mail each brand with what you have and want. The recommendations should be pretty similar.

Just to throw you off, if you now have a Quadrajet 4bbl supplied as original, you can consider finding a QJ carb tuning/racing book and rebuild what you have. The QJ is actually a very effective racing carb if not messed up, but is fine for hi-po daily street use. Later editions get tougher to work with because of emissions compromises. For your purposes, changing 4bbl carbs will not do much. Changing from 2 to 4bbl and/or changing the manifold should.

Drive the car with a tach and decide where you really want the greatest power increase, and consider that you aren't changing the cam now, heads, or exhaust. Just don't get sucked into all-out racing parts on a stock daily driver or you'll be left with a listless motor that your previous setup could have passed by.