No the fwd 2.6 is a totally different block from the rwd / 4wd truck block. The head can work, but if it has the air pump on the back of the head, that could cause issues with using it on the truck. Then you still need the intake and exhaust manifold, distributor, carb, and other parts. My bet is that someone at that shop either needed the head or knew someone that needed one, and sold it / used it.