Originally my engine had an alternator, power steering, and AIR pump. I will now have alternator, power steering and A/C. I have the original Alt base bracket which lines up a single alt pulley to run directly off of the inside balancer groove. I bought a 2 groove water pump pulley 3995646. It is exactly 1" too tall. I could make a spacer, but I'd rather have a machine shop cut it down and move the face back 1". After that is done, the 2 grooves will line up perfectly with the 2 outer grooves in the balancer. Then I can fab the brackets for a/c, and p/s.