05 Pete 379 Vibration

I have a 05 Pete 379. C15 with 18 speed. I recently lost yoke nut behind carrier bearing which caused shaft to come loose, obviously causing a nice amount of damage. During the repair I had a complete shaft built (carrier bearing to front rear), with new joints, yoke and carrier bearing. Since back going I’ve noticed a vibration, sometimes I feel it sometimes I do not. It starts right about 50 mph and is at its worst from there to about 65-70 and then eases out a bit to more steady. Scale of 1-10 about a 5. I have all 10 new tires tight bushings and recent front end. No issue of this before the shaft incident. I’ve checked everything I know to check, and also replaced the remaining U-joints. So all new joints and carrier front to back. I feel it most in my feet. Everywhere else just feels like it’s minor. Like I said, no issue of this before. Any suggestions would be appreciated. And yes I do have all my joints in the shaft in line with one another. Thanks