Water valve for Sanden upgrade

I was looking at several pictures of A/C upgrades in A Bodies to Sanden compressors among others, and noticed the water valve was missing and the lines went straight to the expansion valve and evaporator. I may just be mistaken because looking at my service manual, 68 Darts had the water valve on the fender while B Bodies were on the firewall. Can someone who's done an A/C upgrade let me know if the water valve stays stock or if the upgrade does away with it for some other setup? I’m looking at one on a parts car for a backup should mine fail at some point but didn’t want to buy it if I don’t need it later. And I’m going from 225 to 383, if that changes anything too.