our track cars eating up the CV's

[Driven5]

Don't the off-road VW's run 930 CV's not so much for their strength, but for their added articulation over Type 2 CV's? I thought they have something like a 25+ degree limit. If that might be good enough, it seems to me that swapping over to some custom length 930 CV axles might be the easy button here.

[Kartracer47]

On cars that I have built with CV joints, I just cut and sleeved the axles for the solid shafts. V=notch the sleeve, preheat and a good weld. If you can get the tubular right side axles, then they can just be shortened and rewelded.
Bent Wrenched called the problem - too much angle. The greater the static angle the more the plunge.