Clearance question

My 5.9 was out of a Ram 2500 truck, and went into my 68 Dart. I have an aftermarket "Champion" aluminum radiator and if anything the ram fan was too far away from the radiator. I went to the salvage yard a pulled a couple other fans and clutches off of Durango's, Dakota's, Cherokees. Don't remember exactly which one I ended up using, but it has a little bit longer nut where it screws onto the waterpump, which moves it forward a little but I still have plenty of room.