Drivetrain vibration problem

Its an old car brother, nothing is going to be easy. lol

Chryslers quality control was never that great. There old driveshafts were built ok at best. Most of us are upgrading our Horse power, and expecting the old parts to keep up. For example going from a 318 to a HiPo 360. The 318 DS was balanced for the rpm's of a 318, not the higher rpm's of a HiPo 360.

Long story short get the old drive shaft/u-joints balanced. 8)