Ken,
You might want to look at Hot Rod Magazine from a few months ago. This guy had a 292" 6 with a draw through turbo and was running 10.7 sec 1/4's. He had a variable boost guage inside. The mag people said it drove like a semi stocker on the street, and he did drive it to the drag strip, but just turned up the boost to run. BTW it was a 37 Chevy coupe with a home built frame and a Olds rear end. IIRC it was running a T04 turbo drawing through a quadrajet. Just something to think about.
Dennis