Front Driveshaft:
I made a long driveshaft for the front out of a Muggy center rear driveshaft that I cut in half (4mm diameter) and a piece of this:
8mm aluminum tube (2mm wall thickness)
I drilled and tapped three set screw holes in each end of the Al tube, ground flats on the Muggy half drive-shafts, and had to hammer them into the Al tube. Then I used red Loctite and 4mm set screws.
Length is about 10":
Red Loctite and assembly:
Installed in truck:
This is the part that I probably have the least confidence in on the entire build. I hope it holds up