Finally found oil leak

[KWKloeber]

Interesting. Looks like it's pinched behind the body of the oil switch. 

[glennd3]

I replaced the sending unit today. I removed the alternator just so I could see a little of what I was doing. Job took about an hour. I got lucky getting the screw started that holds the wire on the end of the unit. Big old fingers in a small space with no visual. Anyway started engine and no leak so hopefully that was it. Some pictures..