Boost

Sorry about that last post I sent it with my phone.

My setup is a 1972 fastback with 3.90 gear 2800 stall built AOD 4v OC heads running a procharger p1sc and a blow thru carb on 10 psi.I use a wideband afr gauge to tune the carb but the timing is NUTS. It runs best at 39 degrees locked. Which still isn't that great. My best run is 11.6 at 121mph with a horrible 60ft cause I spun.

I just figure I'm down 50 to 100 hp somewhere.Maybe it's the 2.5 inch exhaust?