One answer to my question about a four eared V5 with a six groove pulley is the 94-97 S10/Sonoma.

I'm still assuming the ear mount will be a better choice than a direct mount. I have access to machining and welding tools if that makes a difference to the mounting choice. I'm not looking for more work, just less aggravation overall. The simpler the better. Tim sent the following link to all the V...

Thanks for the response. The variable displacement compressor makes a lot of sense to me. I'm willing to try it if I can figure out how to mount it. I'm assuming you don't have a performance graph for the R4 to compare with the V7. From your experience do you believe the V7 is worth the extra effort...

Year: 1989 Make: Chevrolet Model: G20 (full size van) Current AC: R4 with R12 Front air only (no rear) Serpentine belt on steel mounting brackets (steel used in 88, 89, and maybe 90) About six years ago, I installed a new R4 compressor on my full size Chevy van. I thought all the leaks were repaired...