Power Steering Pulley Part Number and Pic Please?

[Gregski]

apologies, yet another pulley post...

so it's time to replace my belts on my beloved '71 GMC 350/350 however somehow I ended up with an odd ball part # 15390 39" length power steering belt, I believe the right length should be 35" hence part # 15350 (I like to use ACDELCO belts)

does anyone know of the proper power steering pulley part number so I can check mine (part # 3993341D M), my '71 came with all 73-87 Third Gen accessories all hodge podged together and I replaced them all with what I thought were proper Second Gen ones.

if it helps I am now running the two grove crank pulley (part # 3744043BA) and a two groove water pump pulley, (I deleted the factory AC) showing you some pics and part numbers

I will add the water pump and power steering pulley info in additional posts to keep the pics separate

I really appreciate your help guys,
Greg