I just put the superlift 6 " suspension lift on my k-5 and installed the new motor and everthing was working fine until i broke a u-joint. I replaced the joint and now the drivehsaft is too short i guess b/c of the beefier joints. Anyways my buddy is a mechanic and he says he can extend the driveshaft, should i have him do this or should i just order a new custom shaft from somewhere??? any tips??
If he doesn't have experience with driveshafts, I wouldn't let yours be his first. It would have to be cut, new metal welded in, and balanced.
I would either order a custom one, or take it to a driveline shop and get it done right.