Alas, that's not the problem. The bushing I'm talking about is in horizontal plane. There are two of these. The front one, held by a bolt, easy enough to deal with and the rear one--6150520150--which is somehow pressed in but I don't know if that's a job for a home mechanic. In fact, I'm not even sure what kind of tool could get it out.
Also, forgot to ask earlier if anyone has replaced the LOWER vertical bushing, the one through which oil pump shaft protrudes. Or, has anyone even heard of one these needing to be replaced? After removing the grub screw holding it I tried to tap it out gently but it wouldn't budge.