Very nice to see a Paxton on a GT/CS. That must really get ooohs and aahs when you open the hood up. Kewl!
I, too was wondering about one for my 390. I "think" that the power curve, and the boost curve from the paxton both peak out by the time you're at 5 grand (rpm, not $$). So, the torque is more than enough, before you need the Paxton to kick in.
I think I'll go with a tri-power on my 390, since I just saw that Demon 2-bbl carbs are now available for that setup. 2-4-6 bbls on demand!
I once drive a 4-speed '68 GT-350 convert. from a SAAC convention in Portland (to Sacto.)--that had a Paxton on it. A VERY COOL experience!! I was getting thumbs up from yuppies in beemers going to work in Portland that morning.
You could merge into the fast lane ANY TIME YOU WANTED with that kinda hp.
Paul N.