I dont believe the crossmember will allow you the room to pull the upper pan to do the work your talking about. Even if you could, I wouldn't waste the cash. If its eaten 1 bearing bad enough to knock, the others can't be that far behind and the top end was prolly starved real good. Junk yard motor would be the direction I would want to go. I know if the engine in my 240 went, it would become an instant parts car. Motors for these are just too expensive rebuilt or new.