For my next mod, I planned on getting 4.10's with a hypertech programmer to fix the speedo. Well, I was reading around on stangnet today, and I found out that apparently, ALL 98 auto GT's have 3.27 from factory? Does anyone know if thats true? If so, I was thinking going to 4.10's would make a difference, but maybe not as much difference as I wanted. So then I got to thinking, after the gear cost, hypertech cost and installation cost (no way I am messing with the rear end myself) I figured I could probably get a used set of PI heads and intake, with maybe a set of cams from comp cams, for not much more then I would end up paying with the gears when all is said and done. I would have to install the heads and intake myself, but I think I could handle that with the help of some friends. So my question is this, which one will give me lower 1/4 mile times? Which one is safer? And if you had the choice, which one would you go with? Thanks for the input, as usual I would be lost in life without this forum.