I have a 1997 3.8L V6 mustang. I just put ported and polished upper and lower intakes, heads, cam and, long tube headers on my car. My question is, what gear and stall combination should I go with? My car is obviously an automatic, and my current gears are stock. Since I installed these items, my power band moved way up in the R.P.M. range. Basically, my car is even slower off the line than when it was stock. I would like to get some opinions on different set ups. Anything helps! Thanks guys and girls.