I have 4 52mm guages and I still need a air/fuel guage to complete it.I think oil pressure is insurance either way stock or new motor.What happens if you OMP craps out and you didn't see the pressure drop????Siezed to **** motor. https://www.nopistons.com/forums/pub..._DIR#>/sad.png

I say pic the gauges that mean the difference between life and death of your motor.