Small block keeps blowing the oil filter off?

I've got a mechanically pressure gauge, and the needle is pegged. I already replaced the gasket behind the plate, and finally got it to hold oil. I ran it last night for about 5 minutes to break in the cam, but it got real hot, so I shut it down. I've drained the oil, and will begin again with new oil, but I want the pressure to be normal before I continue.