kobbymike,
The '67 Cat used a 4 blade fan about 19 inches across with no clutch. It bolts through an aluminum spacer to the water pump. The fan shroud is a one piece affair that covers the entire backside of the radiator with about a 21 inch opening for the fan to spin in. I don't know the part numbers but I can search for them if you really need them (gotta crawl over a couple of stacks of wood and Goat parts to get to the car
).
BAH