temp gauge aftermarket problem s2 1969

[mike alain]

Folks,  all my gauges were toast after sitting in the sun and damp,   bought a set from China, looks same, even with the "smiths" logo,  but temp and oil pressure read too high,
could I put some sort of resistor to bring them down or do I try lots of 'senders' to find which one will work,  oil pressure with original reads 50 lbs, with new unit reads 100lbs,
thanks   Mike.

[BDA]

Have you checked the voltage out of the voltage stabilizer? It should be 10v.