I'm curious about balancing the multi-shafts as a unit. My truck has 3 shafts with pillow block/midship bearings supporting the center shaft and ends of the front and rear shafts. I would think that as long as the phase hasn't changed with the new shaft and u-joint then just balance the new shaft and be done. Am I missing something, how would they balance a multi-piece unit with floating midship bearings?

1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy