[Ford blue blood]

The 2bbl heads are better on the street, just need to get pistons that will bump the compression up to 9.5 : 1. The intakes are available, found a real nice one on the HAMB for under 100, they are out there used and new. The 4bbl exhaust (cast) don't seal up at all on the 2bbl heads. Good 2bbl exhaust are hard to come by. Sanderson sells headers plus an adaptor to put them on a 2bbl head.

Now having said all of that, you have the 4bbl motor, run it, just put some gears in the thing if you want it to be fast on the low end (3:90/4:11 with an AOD).