complete trans where to buy.........

I'm looking for a 727. And need a fairly stout trans. I'm new to the a body sceene and want some advice. I'm in need of a trans. I could build one, (i have in the past but it was a chevy and it just was a factory rebuild) now I'm looking for a reverse pattern manual valvebody trans that can hold up to street use but will see more track time that street. I want a trans that will not fail(when properly maintained) and that I will not have to worry about behind my modified 5.7 hemi with a 150 shot. I should be in the 650 flywheel hp range when on the bottle. Any builders come to mind? Thanks a bunch.