Would it be wise to rebuild the trans myself? any suggestions would be great!

I have over 25 years of professional experience and I would highly discourage you to do it.. Can you, yes.. should you, No. Here is the reason.. These transmissions are very complex, unlike the C-4's C-6's , turbo 350's and 400's from years ago.. A lot of electronics and smaller clearances .. I would buy a remanufactured unit, install it and be done with it. Most of these reman uints come with a 100,000 mile warranty or 36 months, whichever comes first.. Jasper Engines and Transmissions is where I would begin. If they build this unit then I would buy from them. They are the nations largest and for a good reason. Best of luck. Chuck