Have used DTS( Drive train service) for several things in the past. Driveshaft behind the 727 i just took out to go to a 904 was made by them.
Shouldnt be far from you, they are in Warren

69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8