We have all been there at some point before these engines taught us lessons.
Amazing how long they last if you just keep up on maintenance.
Truly a 'don't fix it if it ain't broke'...
One more thing, since you are at the oil pump.
Use a high heat thread locker/sealer like Loctite for the screen pickup tube that goes into the housing - we don't want any air in the oil lines!
Definetly check for even compression on the cylinders.
They can run as low as 95 lbs. for ages if you don't push it.