Yep, I was thinking, "Geez, I hope you didn't pull the motor cause the oil pressure guage read 'zero' and the alarm was going off. If you did, you wasted a bunch of time, money, and energy!"
on second thought they must have been hooked up because I was getting OP readings at the guage. The mechanic that started the work on my engine may have removed them. I pulled the engine mainly to knock off the rust and paint it. Also wanted to clean/paint the bilge. Thanks for the info guys.