I just took the cab completely off the frame on my 65 C10 by myself. The four bolts were soaked with PB Blaster and I put the breaker bar on them and out they all came! To replace the bushings, Do one side at a time. Take out both bolts on one side, jack up that side enough to get the bushings out, set it back down, tighten bolts. Repeat on other side. Should be able to do it in about an hour.
