Unhappy results... Any sugestions?
 

I recently raced at the local drag stip and was a little dissapointed. I ran 13.2 sec at 104mph 1/4 mile.

I have a 1988 Mustang GT Convertible
377 stroker 9.6:1 comp
Trick flow allum heads
H-beam rods w/ Ross pistons
Edlebrock Performer RPM2 Intake
650 Speed Demon Carb
AOD Auto Trans
3.73 rear end

I think my horse power is around 450.

It feels like the car should be faster than that, I was hoping to be mid 12's as it is now, I was hoping I wouldnt have to put 4.30 gears in but If you have any suggestions for me to look at PLEASE give them to me

thanks