Replacing 225 water pump

First glue the gasket to the block, using Edelbrock Gasgacinch.
Put Gasgacinch on one side of the gasket, and on the block.
Let tack up, then install the gasket. Then put RTV on the other side of the gasket, and install pump.
Hand tight at first, letting the RTV set up for about a half hour. Then torque to spec.

Do not use RTV on the threads of the bolts, unless you like gunked up bolts and threads
when you remove them next time. Use Permatex thread sealant, on any bolt that goes into an oil, or water jacket.

I install the bypass hose after the pump is installed. Put a little WD40 on the inside of the hose, and the fittings. With a little persuasion, it will slide on.