If anyone wants to make some quick disconnect pins for a truck, all you really have to do is cut out the hinge, get one of those long bolts with the threads only on the last half inch or so. (make sure the smooth part of the bolt is long enough to go all the way through both sides of the hinge). Then cut off the threaded part, and bevel the edge of the bolt. Then drill a hole to put a cotter pin through. Then when you wanna take your doors off, just pull the cotter pins, pull the bolts, and TA DA! No more doors.
You may have to drill out the hinge pin holes a tiny bit more for the bolt to go through though.
You don't have to buy any special pins, or hinges or anything. You can use the stock ones. And if you are worried about messin' them up, go buy some stock ones from a junkyard to build them out of. It insanely easy.