I'm not sure I understand your question. I have a '49 half ton with a '59 235 engine. I chose to use the original temperature and oil pressure gauges. They work just fine. The oil pressure gauge runs "pegged" all the time at 30 psi, but this doesn't seem to hurt anything. I don't know exactly what pressure it's running at, but I do know it's always north of 30 psi.