Well I sent my 91 stang off for paint.  I have the motor and tranny in my garage, and I'm wanting to put trickflow heads and intake on it.  My only problem is I don't know enough about heads to pick the ones out that I should use.  I'm leaving the block stock for money reasons.  The car has a small cam in it right now but I may change it for a bigger one, I also have long tube headers.  I have to keep the compression down for when I supercharge it.  Which series should I use??  

The most important thing to remember is to match your combination. The best way to go is a complete kit (Cam, Heads, Intake). These combination have been tested to produce the most HP for your money. Edlebrock makes some really good proven combinations. If your planning to add forced induction to the car later you might want some bigger combustion chambers, but if your going NA then a little small to make more compression.