Engine Starting Issues

Good news and bad news, Good news is i got it started, turns out I was 180 off. bad news is I have no oil pressure

The lifters and push rods that are in the motor are supposidly from mancini racing they have the oil holes in the side of the lifter and going through the push rod to the head. We didn't prime the oil pump with a drill because we didn't have the right tool to go down into the oil pump, we cranked it over for about 2 minutes and it ran for about 20 seconds but my pressure gauge read 0 the entire time.

I pulled the valve covers off and intake manifold off and pulled out a lifter and the head was completely dry, but there was oil on the cam.
I am going to get the correct tool tomarow to prime the pump with an electric drill and see if i can build pressure.

Any ideas things i should check for?