Drum brake weights interfering with cragar ss wheels

Thanks... well I will leave the weight on for now and focus on checking over the most simple items to review. Was under the car today checking the steering linkage and the drive shaft including u-joints and differential + transmission yokes. Noticed two things: 1) Idler arm is sloppy at the K frame mount - looks like the bushing has been squashed/worn out. 2) the output shaft at the transmission has some play.
Thinking the vibration is primarily in the driveline as it is most prevalent at speeds 50+ and goes away if I put the transmission in neutral and continue revving. Vibe is only a tiny bit in steering wheel and primarily in seat of pants.
So thinking there may be a bushing in the end of the transmission that is worn?
...Anyone know if that is what keeps the transmission output shaft/yoke from wobbling during rotation?
(Maybe I should start a new thread- Sorry don't want to hijack this thread but may be useful for others trying to diagnose vibration issues)