I ended up with two front and rear seals since I ended up buying a lower gasket set (Federal Mogul) after I bought a front and rear seal from Cummins. Do any of you prefer one over the other? The Federal rear seal looks like a better seal to me than the Cummins OEM but that's just an observation. Just to make sure of install procedure, the plastic seal guide slips OVER the crank end and the open part of the seal faces the engine, correct? Thanks.