Oil filter housing leaking, can't get it to stop SB 273

OK, leaking from the circumference of the adapter housing, there aren't too many possibilities. Either the housing is warped or cracked, or the original gasket is still in the block. As for the last, I've seen an old gasket that was embedded in the block so well, and was the same color as the cast iron of the block, that it looked like there was no gasket there. But pry on it with a knife or small screwdriver, and it comes out. Either way, the adapter has to come out to see what's up.

Oh, and I think the wagon wheel gasket is the wrong gasket for using the right angle adapter.