To get back to the subject off interference VS non-interference. I have a 1997 four door and broke a timing belt going 75mph on the high way and it didn't do any damage. Just swapped in a new belt and away I went. Been driving it daily since then for over a year!
My trackkick is a 4 spd auto with the 5.13 gears. LEt say I was able to find some 5.38, would there be a significant differnence. I am running 31's and will most likely not go bigger. With the auto, I find it often needs to downshift on the highway and I am thinking taht extra bit of gearing could help, but I will not do it if the difference would be minimal.