no oil pressure

i checked and the sending unit is plugged in, it doesnt rattle or click despite the new cams. everything sounds fine. i'm pretty sure its a bad sending unit but i'm not gonna drive it til i see oil pressure. dont feel like destroying all my work lol.
 
it ended up being a bad sending unit. i checked it by lifting the car and replacing the sending unit with a mechanical guage, then had my friend watch it as i turned it over. not sure why it would fail during down time, but at least it was an easy fix.