Oil Leaks ???

[55 Fargo]

Hi all, want to drop the oil pan and clean out, and replace gaskets.

This engine leaks a lot of oil from the pan and rear main seal area.

Can the rear mainseal be replaced on a 1951 engine without pulling the flywheel?

If I just replace the pan gasket, will that make a big difference?

Some day this engine will either be replaced by my other 251, or be rebuilt, I have a 1955 Fargo 251 with full flow oil filtration, might use that one in here.

Thanx Fred