ok. i think i'm just going to find another oil pres. gauge at the wreckers with those p/n's.....my only question is what kind of wiring is required to hook up that sending unit after i install it on the engine??
If your original sending unit looks like a Motorcraft SW-2220, it has a threaded stud coming out of the top that the wire connects to, you shouldn't have to make any modifications to the wiring at all.
On the newer cars, Ford changed the sending unit connector, in that case, you have to either change the connector or build an adapter.