I got this 350 tubo trans thatis supposed to be out of a corvette. I need to switch the main shaft over to 4wd and I don't know the condition so I am going to rebuild it also. I need to know where can I find a date code or something on the tranny to get the correct rebuild kit? Also I rebuilt trannys before but never a th350, and I want to make it tuff so it don't break on me. What parts should I be concerned about upgrading if any. I will be running it behind a corvette tune port engine with a really low range transfercase. I am also throttle happy on the trails.