gpops

I'm looking to buy a 1979 4x4 4.9L F150 and can't find concrete information online. The truck has power steering, but no factory A/C. I'd like to add an aftermarket A/C system (Nostalgic A/C). Does anyone have pictures of how to mount both? And what are the part#s for the brackets? What size serpentine belts will I need (or will I just try different ones until it fits)?

Nostalgic AC says that the A/C won't fit if power steering is installed, but one of their customers rigged it to work. I found this diagram:
http://repairguide.autozone.com/znet...528007c0fa.gif