Just for comparison, I just put in a three gauge set in my LCF, decent gauges, AutoMeter. My 283 runs 40 psi cold at 1500 RPM, hot idle is 20 PSI. Original dash gauge does not have the small increments that the AutoMeter has but they do agree.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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