Use a Disco 1 or RR classic trans that is totally mechanical.
There is also a really cool shifter that looks like a manual gear shift, but is designed for automatic.
Uncle Douglas installed one on Trey's V8 110 and it worked flawlessly and was really a nice setup.
I don'r remember who makes it, but someone here will know.
Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)
"What's with this death wobble, Uncle Douglas, I can't keep it in 1 lane?"
UD: "Just Power through it man!"