Everything is back together after new intake gaskets, and held 5 lbs of water pressure for thirty min.
I added a few gauges, the clear 1/8 line from intake runner goes to vacum guage, the gauge you can see the face of is water pressure tapped from the water crossover. I turned the guage towards the rear so that I could read it while setting the overpressure valve.
This is how I tried to test/set the new overpressure valve (it wont stay like this, just the only way I could test it on the boat while not at the lake). The water comes in from the garden hose, passes through the galvanized tee, and proceeds to the engine, one leg of the tee leads to the overpressure valve.
Anyway I found that with water freely running through the block the water pressure guage just barely moves off zero, when I block off one dumps from the block with my finger I can create pressure enough to move the guage to about seven pounds. I then set the valve to start dumping at five pounds pressure. I fugured I had it at that point, but when partially block off both dumps from the block the dump valve opens but the pressure on the guage rises past ten, So what am I doing wrong????