A/C pullies vs no A/C (1987 GMC V2500)

[Buick455]

I have all the accessories off the front of the engine so I could paint everything. I plan to put factory A/C on at some point from a doner and wanted to know what pulleys are different for adding A/C. The truck is a 1987 and has the alternator on the left side with air pump under it and the power steering pump on the Right side facing the front. The alternator is driven by a serpentine type belt without a tensioner. (The photo is before I painted everything)