Beefing up a 727 trans!

Hey guys and gals I am back and hoping all over here again so here the problem is.

I recently got a 727 trans from a huge deal I made. Its a big block trans that came witht he 383 I bought from a 63 Chrysler 300. My question is how would I change things or get things that would make the 727 last through drag racing with 700 horsepower in front of it. I want a reverse manual valve body badly so what company sells a really nice one for the 727? I would like a cheap one yet one that will never fail at the track. So anyways what would I have to do to beef up the 727 trans and what company sells a nice reverse manual valve body?

Thanks all and I will always be here!