i know yorks have ben done many times as well as sandens but converting the "newer" a/c pumps isnt a very long-term lifespan for them.
heres something posted by DOUG a.k.a. DJDAUDIO. hes a wizard with info and knows more than the factory who made the comps, "almost anyways".
http://www.s10forum.com/forum/f125/harison-compressors-facts-and-info-stock-4-3-ac-pump-241840/