Here is a picture of a splitting stand that I designed to split a Farmall A, B and C series tractor. The stand is shown on a BN. Once the flywheel is removed the seal retainer can be removed. Two pieces of felt are used to seal around the crankshaft. Make sure to check the holder for warping, they have the tendency to warp badly. My local machine shop is able to flaten them so they can be reused. Good luck.