A little advice please

I figure it's my car, money, and imagination so why not. I am putting in a Cummins to one make it reliable and two so that it will have power and mpg.

Sounds like you have a good plan and know what you are in for.
Actually, i'm glad you are doing it, you are a ground breaker.
Good luck with it, i really am interested on how it turns out.
Please start a thread on the build process with lots of pics!