[Dominik]

Bob,
very nice, very nice!

Which half shaft do you use for that axle? Or are these the ones described later in your reply?
You need to allow for some movement at bumps somewhere, don't you?

I used the same method of shortening the shafts. Torque is transmitted via the circumfence of a pipe. Double the diameter "D" and the pipe will stand D**4 (!) more torque.
(D**3 for solid materials)

Just look at those tiny half shafts from the Group-C. That car was raced before with an all aluminum Chevy with 500 cui and fuel injection.

Those in the pic are more prone to go apart than the thicker original units, but do not destroy as much if they fail.

Are we still with the topic?

Dominik