I hoping that someone can help me work out some of the bugs in a 455 olds packajet that has just been installed in a 19 foot jolly rodger-----I have put a pressure guage on the intake manifold which is a edlebrock performer---its up near the front next to the thermostat housing --is this the right place for it?At idle I dont have any water pressure reading and at 2500 I only have 11 pounds--this is with the bypass which is an old T handle type screwed down all the way.Shouldnt the pressure be a lot higher with it screwed down all the way? Should I go to the newer type of bypass? Is the pump not putting out? Supposedly the pump has been rebuilt, so I hope thats not the problem. The fitting on the pump is a 3/8 pipe thread --are newer pumps a bigger fitting.When we first ran it it was overheating at 2500 rpm so we took the thermostat out and now it runs cooler but still no pressure at idle up to 1800 or so. Can somebody help thats seen this before. Not stumpedd but getting close.