Another simple question by the new guy

I've got a question i have a 1985 mustang HO 5.0 it's got 175,000 miles on it but it has full race exhaust, headers, plugs and wires, shifter for a five speed transmission and its about to have 3.73 gears in it but right now its got 2.73 i live in Midland, TX we race at Penwell, TX what do you think it should run when we put the 3.73 in it what do you think it should run............. right now it runs 15.07.et in the Q- mile we think it should be running faster what do you think the problem is if there is a problem

What does the tach read through the trap, and through the lights?

The best run 15.02.et 90mph

At Firebird, these cars with a decent set of gears usually run low 14's to high 13's. It will all depend on the condition of your motor with that many miles on it. Bolt a set of drag radials on it so it'll hook up.