I purchased a rear end from a 1941 Chev pickup to put in my 41 GMC. I need to replace the outer bearings and seals but can't determine if it is a 1/2 or 3/4 ton rear end. The bearing is a cylindrical roller bearing: outside diameter of 2 1/4", inside diameter (bore) of 1 7/8" and the width is 1". Does anyone know what I've got?