QUOTE(IronHillRestorations @ Sep 22 2019, 05:17 PM)

There's a keyway on the crankshaft and the fan hub, and there's a pin on the hub and a corresponding hole in the impeller, so if you have all the right parts and everything is there, only one way to put it together. If the pin is gone, you have the impeller indexed wrong
Great thanks for the reply, I’m not much of a mechanic so I get a bit confused easy. The TDC mark on the impeller and TDC on the #1 piston are in the same position at the same time so I’m guessing after that the distributor position will just follow that. Im pretty sure I can get er done. Thanks again