1993-4runner

Hello all, I just purchased a 93 4runner, it's in fairly decent shape overall, it needs some tlc, but I'm excited =)

However, it came to me w/o the front drive shaft install (previous owner said it needed balanced) I installed the driveline to see see how bad the vibration is...it is awful (when 4x4 is engaged) especially when decelerating to a stop, isn't as bad when applying throttle.

Background info:
Has mystery 4inch ifs lift
Newer rear driveshaft
V6, 5spd
Double cardan joint seems to be nearly maxed out
Does NOT appear to be missing any weights
Do not know if it started vibrating when lift was installed or if it became a recent problem
Thanks for any words of advice and I'm excited to be here =D