I do have the drag test of a 72 Mr Norm GSS car that had 3.55 gears and ran a best of 13.92 at 106. MPH is phenomenal for ET, but was this because if tire spin which usually equates to this. I used to have a 73 340 Dart with stock 340 and 3.91 gears that ran a best of 13.92 but I believe the MPH was in the mid 90's and was hooking. I saw the supercharger on Ebay and kick myself for not bidding on it. I would love to find a "complete" kit and see what it will do. I think I will pursue the the California connection and see what he has.