New Tranny in the spring... Suggestions

I am going to get a new tranny in the spring. I was thinking since I have to replace the old one anyway, I minds well go with something beefier! I was looking into the Lentech AODs for my 90 5.0, I want something to take the grunt of 450+ HP that I will be looking to get from my engine in the next year.

Anyone use a Lentech or have any suggestions on an alternative?

Oh yeah it is a daily driver. I can not stand to be in anything but a Mustang if I am driving... Dad wanted to trade cars for a couple days to have a guy at work look at mine. I refused to let him take it. I could have drove the Benz around for a couple days, but that is not a comfy car!

This next year while I get the 5.0 done, I am going to get a 4cyl to drive when I want to get somewhere long distance and in bad weather. The 5.0 will be the toy car!

That is all depending on the tranny cost right now... toying with getting a junker with a 5 spd and swapping. C4 is not a option since I want to be able to cruise in the car not just race it!