When I changed mine, I just bolted off the pump, when unbolted the pully. Bolted the new pump to the engine, and then bolted the pully back on. Then put on the lower hose and belt and was done with it.
Of course added coolant.
It's bolt off, then bolt on.
-1995 Conv V6 H/C/I and all bolt ons
-1994 Coupe V6 built by GSS Motorsports, painted by Allen Skaggs (Flawless Customs)