Thanks everyone that shared there opinions on what might be my problem.
J-Mec's Pics show just what the problem is....On a 1810 pump, it does NOT have a pressure relief valve in the side of the pump. As my diagram shows a 1811 pump, it DOES have a relief valve on the side of the pump (diagram D). On my 1810 pump that hole is empty with just the a plug screwed into it to plug it off. To test this theory, I took the relief valve (diagram D) out of my 782's pump and installed it into my 1810 pump and after test driving my problem was SOLVED.
My (partner in crime) AKA good friend is a tool maker, and has is own lathe. He is making that entire kit (D) except for the spring, the spring is easily obtainable. He is also repairing my leaky "pressure relief valves" (B) and I will tig weld the ends back on.
I will post pics in the next couple of days
