Hey there scrappy!, glad to hear your ready for your first mod, but let me ask you this before I offer my suggestions?
1. Have you tuned the car as far as new plugs, wires, cap, rotor, etc......?
2. What is your ULTIMATE goal for your Mustang?
3. How many miles on this baby?
Hurry up, I'm waiting with beer, I mean baited breath!
P.S. You don't have one of those EEC computers that rev-limit to 7300 rpm's do ya?
