Alright here's the story. I have a 90 mustang gt with a BBK cai, 65 mm tb, underdrive pulleys, ac elim, smog elim, electric fan, headers, h-pipe, flowmaster catback (2.5 inch), 4:10's, Weld big 'n skinnies. I am also going to add a c4 with a TCI break away torque convertor, shift kit and hammer shifter. Last summer with just headers, h-pipe and jimmy rigged exhaust i went 16 flat leaving it in D. With this mods, including the tranny, what am i looking at goin this summer. i'm hoping for 13's but i don't know if it will make it there. any help is appreciated