Hey Jack...thanks for the reminder!
Just started the process of figuring out what kind of driveshaft I need to assemble. What with this rig belonging in the Frankenbus category...it too promises to be another interesting experiment. Have handed off most of the specs and particulars to an old, local driveline company. They re-geared the Dana 80 axle I installed and were great to work with then. Let's hope they are still that way. And I'm learning more than I ever wanted to know about the process. For example...when asked for the measurements of the bolt holes...they don't care about the X or Y axis pair...they want a diagonal measure from the center of the hole in one corner to the center of the hole in the opposite corner. Weird, right? And I still don't know if I can get by with a one piece shaft...or if it will have to be a two piece affair. Until the "experts" run all the numbers, including the mystical "Critical Shaft Speed" (which I calculated to be about 2700 RPM)...we'll just have to wait and see what the Pros come back with.
Meanwhile, I did find a chart online that indicates that if you want to go really fast...a $$$$$ Carbon Fiber shaft is the only way to go. They appear to be good up to around 11,500 RPM.
Probably not anything I'll need...or could afford.
Pix will of course follow as bits & pieces come together.