No cam expert here but...

[F-BIRD'88]

Definitely entertain some more rocker ratio on the intake.

Replace the cam first.

[F-BIRD'88]

If you want to go to a single plane manifold get at least 4.30 gears. 4.56 is what you really need. Get a racing converter. 4500+ stall. Get real drag slicks and Cal-tracs. Either move your cam to a 102 in c/l or replace..

[RevTheory]

Definitely entertain some more rocker ratio on the intake.

Replace the cam first.

Just change it out, huh? No need to fix an obvious shortcoming first? Hell, he may as well stack 4 q-jets on a blower and lock the distributor