I have a homemade manual adjustable gantry crane that I attach four ratchet straps to. I used in last month to pull a bed and a cab off a 92 D250 and it works just fine. Harbor Freight has something like it but is much more expensive then the one I built. It has more features than mine though.

crane.jpg

The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!