Small block keeps blowing the oil filter off?

I dropped the centerlink, and the pan. I've found that the rod bearings all are scored. I had the time, and I had another oil pan gasket, and already bought the new pump, so I filled it with some Brad Penn, and Lucas oil treatment. It has normal pressure now, and runs good, but it's just a matter of time before it lets go. That sucks.
Thanks everyone for the advice.