It is a 70&1/2. I just read my post again, and I think I condensed the message a little too much. I don't own the car, I am just the engine builder.
I remember the Paxton blower/carb system well. They kind of worked. The problem with blowing through any carb is the carb. A carburetor is a siphon, the low pressure area in the venturi draws the fuel. Adding pressure causes problems. The boost tends to push the fuel out of the carb. The paxton setup pressurized the entire carb and raised the fuel pressure as the boost came up. They still suffered from "Rich in the middle - Lean on top" syndrome. Any leak around the throttle linkage caused problems. Most superchargers draw through the carb, but on a Paxton the length of the plumbing causes major throttle response issues.
Scott