I put the motor and tranny in my 73 in about 30 minutes.................of course it took 2 hours to put the cab back on and hook up the wires,lol. At the time, I didn't have a shop, and it was easier ( at least I thought it was at the time) to pull the cab off. Four bolts and a steering linkage, and off she came. The front was already off, and I really hate crawling under a truck in the dirt. Lazy, I know.