My 360 build

Well just found out that the pulleys i cleaned and painted don't fit. The diameter is to big and they hit each other. I dug out my other set they came off the 318 they fit so I will use them. I found a water pump pulley that will work with the crank pulley that I painted but its shorter and uses the first grove closet to the front of the engine im not sure if that will work with my alternator? The set on the 318 has 3 groves