no oil pressure

I think when I did mine I put in between a half quart to a quart and spun it backwards for a few revoultions. I cranked the engine for a long time because one of the wires came out of the MSD box and was keeping it from firing. I only had oil pressure toward the very end before it started anyway. Under normal circumstances I figured I wasn't going to be very worried about pressure on cranking and I was just going to be real careful and make sure it came up in the first few seconds of running or I'd shut the engine off and sort it out. I tried to make sure I lubed everything up pretty good when I put the engine together to begin with.