Bowtie block....new Scat crank, rods, 406 stroker. Fired the newly built motor for the first time. Oil poured out of the rear main. Yesterday, the engine builder and I spent most of the day replacing the rear main adapter unit and seal. This is a new Moroso aluminum billet unit...adapts from one piece, to 2 piece seal. We had to drop the crank slightly to replace it. All back together.....even before the engine starts, just while cranking, I am seeing oil spots on the floor....coming directly from the rear main. Is it possible we got a crank that is slightly undersized from Scat? I know anything is ossible, but what other options are there. Thanks for your input.