look at the shaft and the tip to see if it is twisted ..

I am assuming you are using the hardned shaft intermediate shaft???

and would you be using a HV oil pump?

Tony

70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)