Ok, i took the shaft out today, took it to a drive line shop, and one u-joint was off center, and the shaft was off balance by 8 thou. Fixed the ujoint, balanced her up, and $75 later, all vibration was gone. I found some score marks on the yoke, so i'm going to the tranny mount as preventive mantanance. It feels so solid now, its unbeliavable, if finally stopped vibrating, i took it all the way to 190km/h(governor limiter was taken out last yr) and it felt great. Now i'm 100% sure this car hit the ditch.