If I were you I would get a Lentech street terminator VB. it is so much better than a shift kit. I did all of the free mods to my friends AOD notch and it wound up running 14.59 at 95 with stock 2.73 gears. It was at best a low 16 sec car before this because it had never had a tuneup in 130,000 miles. Remove the passenger seat and spare tire, ice the intake until it's very cold to the touch, get a 70 1/2 inch dayco polycog 6 rib short belt (diagrams are on the net on how to bypass the ps pump at the track) and do the 1-3-1 shuffle. Your heads are holding you back. I see no problem of you running high 13's. I did mid 13's with a stock exaust, slipping tranny, 2 galled cylinders (causing it to injest massive ammounts of oil), leaving at idle because of burned up t-lok with a temp of 90 and dewpoint of 73. My mph was 104.57. If I can do that with that many problems I see no problem for you hitting high 13's.
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1990 5.0 lx aod
best 1/4: 13.65 at 104.57
on bad shortblock
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