Added a washer under the oil spring to bump up the pressure a bit.
Cold idle is now 55psi and 3000rpm is 60psi. I has yet to drop below 20 psi. This Saturday will be the test. Driving 45 min. to Old Town car show. It the same trip that produced the low hot idle pressure before. I also changed the oil to one that is a bit more temperture stabile. Amsoil 10w30 Series 3000 with 3/4 cup of GM EOS

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir