the TCI trans controller is well designed at dealing with the 60e/65e/80e setups. You adjust EVERY parameter to make your setup perform right. TCC lock-up, line pressure, shift points, shift time delay, etc. it can get the job done and doesn't need to pigback the stock pcm, just runs the trans and that is it.
http://www.tciauto.com/electronics/index.htm
Ls1tech is a nice site, im usually there, i have a f-body and a cts-v, before trading her in for the H2.
Those trans will hold fine. I like this company, i have seen there trans hold up to a whole lot of abuse through the silverado i mentioned...
http://www.finishlinetrans.com/index.htm
this is there site, i would call and ask for chuck, really nice guy and should help you out with what you need. They can do the vacum mod if you wish, helps out with the feel of the trans...
good luck!!