Changing Crankshaft Oil Seal on Kohler K321

[AL Farmall Boy]

I've got the Kohler K321 AQS engine on my CC 1450 stripped down and removed the flywheel to replace the crankshaft oil seal behind it. The oil seal on the PTO side of the engine is going to be easy to replace, but the one behind the flywheel I'm not so sure. Do you have to remove the bearing plate to replace the seal? I'm asking because I removed the stator and still don't see the oil seal visible with bearing plate on. I don't care to remove the bearing plate because of dealing with setting end play gap on crankshaft and getting that right. How bad a job is it?