I just installed a 14bFF and 4" blocks (I have a shackle flip, but that will wait until spring). While reconnecting the drive shaft with the truck still up on jackstands, I noticed that at full droop, the drive shaft is all the way extended, maybe more. Anyone else experience this problem? Is there a simple way (another truck) to get a slightly longer driveshaft without going custom? Which will break first, whatever stopping mechanism seems to be built into the shaft, or the u-joint at either end. Oh, '79 Blazer.