After reading your comments and the other contributors to this thread, it sounds to me like you need the adapter plate "Truckedup" used on his truck to assure you have that high water pump position for effective cooling. If you use it, the shaft should be the right length to allow proper clearence for your fan. All you need to complete the change out is a 5/8" harmonic pulley and a 5/8" generator pulley which you should be able to find at most any wrecking yard which has been in business since the 60's or 70's. The other thing you can do is advertise in the "Parts Wanted" area of the swap meet section of this site.
By going with this setup, your truck should look stock.
Good luck!
