http://hotrod.com/techarticles/43059/
Do a couple burn-outs to find an acceptable starting point. I'd probably start with 20psi and go from there. With the 305, if you can't do much of a burn-out on the street with the slicks than don't worry so much about the tire pressure. Just do a small water box burnout to get the water off, stage, and put the pedal to the floor.
What kind of power are you making at the engine?
__________________
, Jon
Owner of a Red Sled.
If it\'s EFI I can tune it. Specialize in 82-95 GM (yes Lt1\'s)
\"If you can leave black marks on a straight from the time you exit a corner till the time you brake for the next turn.......Then, you have enough horsepower\" - Mark Donohue