Oil pressure sensor Location?

OK Dumb Question I know, but I dont see one anywhere on my block!

75 360 Where does it go? I bought a mechanical guage (Autometer) and I was curious if I am going to need an adapter for the threaded fitting that is on there.

I know that the sending unit is near the oil filter on the Slant in the car now, but I cant see one on the block on the engine stand?

Aslo going to be running a mechanical Water temp sensor, I assume it should be installed in the area on my manifold that currently has a cap on it near the heater hose mounting location?

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