Pre 1970 A/C compressor brackets

It not really the Sanden is more efficient, that is an old wives tail that has gone around forever much like the old hoses will leak R134 (they don’t). The real difference is the RV2 take more HP because it pumps a lot more than the Sanden. The only thing the Sanden gives you is a weight advantage. Also you will go through multiple Sandens and the RV2 will still be pumping.