Rebuilding 1986 Pick-up 22R engine with A/C

Hi,
I am finally getting around to rebuilding my pickup after a front-end wreck. No engine damage, mostly radiator and cosmetic.
If I can get it going, I will cut my gas consumption in half!!
I have found most parts, but am trying to find a source for the pulley found just to the right of the belt-tensioner pulley. I am assuming this is part of the A/C system, but not sure. My books are very unhelpful.
The pulley is approx. 6.25 inches wide (159 mm). Width of belt groove is 18 mm with a deep V groove. Center hole is 18 mm with a keyway groove.
Would this be an AC DELCO Part # 38036 Idler Pulley?
Thanking you in advance for any help you can give me. Or maybe someone has one they could ship to me?
ArdisK

To the right from the grill or the cab? I'm not sure which pulley you're talking about.

That would be as you stand looking at the front of the truck it is on the right hand side (Driver's side).
Thank you.
ArdisK

If I'm picturing this right, from left to right, you have A/C, below that to the right you have the tensioner pully, then the crankshaft, the the alternator. As far as the pulleys part number, I couldn't tell you. I hope that helps a little.