d.c. i just experienced the same thing with my samll block and got black flagged last weekend when oil squirtted past the oil filter boss gasket. i had gotten the pumps straight from melling with contingency, (also talked to a couple of other mopar racer with this problem) called melling and asked if they changed anything on these pumps and they said they were not aware of any problems, so let's make them aware of it! call them and ask them what going on and maybe they will look into it. tech guy said most likely bypass valve stuck! dave