The Performer RPM and RPM Air-Gap are the best one size fits all manifold on the market for smallblocks and for most other engines as well. Keep it.

It's a squarebore intake and I'd suggest a Street Demon 650 for it. Looks and works like a T-Quad, but fits on either type of flange. It's good right out of the box, they run around $350 if you shop. Get the space age plastic body.

For a camshaft I'd look at the Voodoo second or third number cam. I'm thinking under 220 intake duration at 0.050 lift. If you're going to run highway gears, then I'd go even smaller.

The distributor would be the last thing I'd change, see how it reacts to the other mods. But the Firecore sold by a member here has gotten rave reviews and is supposedly very easy to change advance curve.

R.