Where is the best place to purchase a water pressure gauge to test my water pressure on my motor. Are the gauges anything special or would any plumbing store have them.

If your going to rig up a temporary deal I would get a gauge from a plumbing supply and hook it into the drain plug on the block or where ever your trying to get a reading. Get a hose long enough to clear the engine hatch when closed (whatch those spinning belts). Get a big gauge so that someone can sit on the rear bench and record the pressure at WOT.

Not quite sure what I need. My borther got a S. Marine crossover for his boat. It came with a T piece on it. One of the openings is like a dial or something and then the others is a male and female end. What is the dial thing for. Is there where you would hook a guage up.