Need advice racing a 380 horse crate engine

Didn't read every post. Something way off here...
example: I ran 14.11 at about 97 mph with virtually a stock 360, no headers, stock converter, 2.45 gears. With 3.55's, 3k stall, headers, and a 380 crate, i'd think very low 12's.
BEFORE I would buy one thing for the car, I'd figure out what cylinder isn't firing, or why the throttle is only coming open 1/2 way, or...… get the picture? something major here.