oil pressure sender ohm readings ?

0-60psi gauge or 0-90 psi?

PSI: 0-10 psi, 0-27 Ohms, 60 psi, 65-90 Ohms

for a typical 0-60. Go to rockauto and get some oil pressure sending units on your screen for various late 70s GM models. They use the same senders in most gauges. Some of the items have the Ohm readings listed (above copied from rockauto also)
 
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