My 74 K20 has a 2WD cab on it(whats left of it anyway /forums/images/graemlins/crazy.gif)--the truck was a 77 but the previous owner changed the cab to a then rust free 74 2WD cab..The bolt in floor hump from the 77 4x4 cab bolted right up to the older 2WD cab,after cutting the solid hump out,and drilling the holes--the hump doesnt fit at the rear near the seat,you will have to fab up a piece of sheet metal to fill the gap--mine was open for awhile,and the heat that gets in the cab thru there is incredible,like a hot air furnace,even in the winter.My truck has a 3 inch body lift,not sure if the transfer case would hit the floor without it.I made a plate to block it off, because mice used it for a handy entrance to the cab,and they ate my lunch I had stashed in the cab one winter day, and some of the wiring harness for desert!. /forums/images/graemlins/angryfire.gif /forums/images/graemlins/screwy.gif