oil pressure sensor
 

I have a 1987 trubo supra and bought a aftermarket oil pressure gauge for it where is the port to hook the oil line to?

This might help, but i'm not to certain. this may just be for troubleshooting, not aftermarket installs.http://cygnusx1.net/Supra/Library/TS.../LU/LU_004.gif

Its under the exhaust manifold towards the front of the engine, its angled up slightly. Dont forget the port on the block is 1/8BPT threads where most aftermarket gauges are 1/8NPT, so you will need a converter fitting.