X, I'm not so sure about your source for
oil pressure. Pull one valve cover off, and then prime your engine with your drill. Look for
oil squrting from around the lifters. The drill should start going easy and then quickly bog down as it starts to pump
oil. If no oil is present, what kind of oil pan do you have? Is it stock or aftermarket? Pulling the pan is no big deal. After you pull the pan, make sure you have a pickup, and if you do, grab it and make sure it's tight. Next, I would put a piece of duct tape over the pickup and then get some clay and put about a 1" ball on the tape. Then reinstall your pan properly, and then remove it and check the clay making sure it is 1/4" thick,(a little thicker is OK, but not thinner). If it's smashed to nothing, there's your problem. If it's OK, I would pull the pump and have that checked out.
Good luck...
Tim