71403 wrote: Unless you dealt with R4's when they were common in daily drivers 15+ years ago you don't appreciate what a headache they were.
My only experience with R4 compressors was on my own '88 and '94 Suburbans, which were orifice tube in front and expansion valve in the rear. The 1988 was R-12, the 1994 factory R134a.
Yes, I had to replace the AC compressors in both, and I remember reading that these same R4 compressors lived a lot longer in similar GM trucks that were front-only AC, and the issues were related to the Suburban's dual AC. Even so, the R4 compressors lasted a several years at least, in Arizona and with daily use. So could work fine for poster's application.