I think i have some rear calipers for those bad bays

If you don't have any luck finding one give me a call at 519-644-1200. London Drive Systems. Or pm me. We shorten/lengthen and balance driveshafts. Any type of driveshaft we can build or alter to what you need.  Matt

U-joint to joint is 46-47". Pretty sure unless someone has one I am going to call the driveline boys, bit the bullet and have it made. I could make it, but I cant balance em myself.

I'll measure them up tonite and let you know. I should remember what the metric is cause I had to get mine cut 3"' last year to match the 5 speed standard I put is last year with the help of JWO of course...

I would go and see Matt ,he really helps the racers the best he can