Hello all, I am new to this forum and was trying to help a friend diagnose an ACleak in his 1986 El Camino. I can't seem to find the low side port for charging. We were wanting to convert this to R134 and thought we would find all the leaks before trying. Does anyone know where they hid this jewel? Also has anyone done this conversion and have any tips? Thanks

If it's an R-12 system then the service ports should be at the inlet (Low side) and outlet (High side) of the compressor.