that power glide wont hold up there a guy! you would have to do more than just slap in some shift kit unless you like sprags stuck in your floorpans. lol if you want to run that fast with that combo you would need to launch that car at 4500 rpm or more gees that gives me tha willys thinking that a stock powerglide would detonate like a bomb! if you are going to get on the street with it you will hate a glide anyway with a 4.11 maybe what 60 wide open? if you are lucky. have you ever seen the inside of a glide? that thought scares me man! best bet for you would be a th 400 with low planets and moded valve body. try a trans brake red alto's and kolenesand find some stainless steels for it. that would be your ticket. no junky old shift kit! the whole thing can be built by you for around 6 or 7 hundred but that's just my thought on the matter after seing the weak parts in a stock glide. in the end it's your car do with it as you will. you obviously want a hard launching car right? to run near super stock times it will cost alot,but if it's a streetbound toy put a manual in it they are more fun;)