I've been meaning to get back to this but things have been rather busy here. I finally got in touch with a friend that I thought might have a test gauge. He did. Cold start is a steady 55psi, goes to a little over 60 when you blip the throttle and then, I'm assuming, the bypass kicks in. As it got hotter, the gauge started dropping a little at idle. Rev it up to a steady rpm and she holds at 55psi. After it hot, 205 on the oil temp, it idles at 23psi. So I changed the "worry" gauge and all is well.
Thanks for all of the input. I was suspecting the bypass plunger but I've never dealt with one. Glad it was just the gauge because I was not really looking to get into the camchest.
