87 drive shaft problem

[50seven]

Stroker87 I read in your OP that you lowered the truck with shackles and hangers. I would look at this closely on a vehicle used for drag racing.

My concerns are pinion angle and axle wrap compounded with the extra shackles. If your truck is hooking up hard who knows what is going on back there? Check your wheelbase you may have altered it from stock (longer)?

I just lowered a truck axle over and the driveshaft needed to be shortened by 3/4"?