I have a 351w HO from an 80's Bronco/Truck. The problem I'm running into is that the water pump pulley that came with the engine is V-belt, and serpentine. I bought a double v-belt water pump pulley from a swapmeet, from what I'm assuming was a 60s-70s Ford engine, put it on and the pulley grooves sit about half an inch or so from the crank pulley. Were the pullies on these engines year/era specific?