[shortymac83]

I've got a similar setup on my 83 olds. I've got a tee going into the block, then the top of the t goes to the gauge, and the arm of it is hooked to a 3 prong sender. the odd prong (not parallel to another one) goes to the light (which I'm assuming would just allow you to wire it to the light you're using), another goes to my electric choke (that way, it heats the choke only when there's oil pressure - IE the motor is running) and the other one I cut off. I believe that the sender is from an 80's buick 231, but I'm not sure. It's the same one that was on buick GN's. That'd be an easy way to have the light light up when there isn't any pressure, because the loop on teh sender closes when the pressure reaches 2-3 PSI.