Moroso PN 65770. Says 19psi. Current item. Use a AN washer for back up on the spring for fine tunning of the PSI.
More stuff flooding in. Remember the black, plastic, 2 1/8", enclosed rectangular gauge cluster. Held 3 SW delux gauges. Had a Fuel pressure, bonnet pressure and manifold pressure. My job as a 7 year old was to watch all three gauges (usually taped to the windshield or in my lap) and report my tracking data to the Boss. Those cars hauled ass. 2.41 gears and a th400. Only way to go! First gear was fantastic. It just kept pulling to 60mph or something. My dad was always trying to find the limits. So 14-15 psi boost, 301e rayjay w/1.3 housing and 400-455 cubes. Very fun. And dont think there were not "Special" turbo cars at H-O. Pioneers for sure.
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