[big gear head]

Please don't take anything out of that rear end without measuring backlash and doing a pattern check on it first. Once you remove parts it's too late to do this and you will have no idea how to set it up again. Also, please do not put punch marks on the left bearing cap and only put one mark on the right cap. Those punch marks can make the cap weak and the left cap carries more of a load than the right one. If the factory paint marks are still on the caps then there is no need to put punch marks on either cap, and even if the caps get mixed up you can still figure out where they go by measuring the bore size.

It looks like that housing is in great shape. Those tubes look like they are free of rust pits and the spring perches look like they haven't been bent or torn from abuse.