i need help! my trucks (81 jimmy) motor started losing oil pressure , but the idiot light didn't come on until just before it siezed, :angryfire: throwing parts of motor around. it is now sitting in my driveway until i can get money to buy a new 350. but my agitation came from the light that didn't come on until too late. my question is, will the gauge set out of a 79 truck work? i read that the lights work on diaphrams that open and close the cicuit to turn the light on, and the gauges use voltage regulators to control the amount of power to the guage, indicating pressure. will replacing the diaphram with the regulator work? and where would they be if they do work? i dont want to ruin my new motor becuase of forced ignorance. thanks in advance.