My suggestion would be to pull the motor, replace rods, replace pistons (have the machine shop check the bore to make sure you can still use standard pistons, if not .020 over), have the crank checked just to make sure it's good and then micropolished. New oil pump (preferably OEM), water pump, bearings, engine gasket set, timing components (depending on how old and what condition they're in). Hot tank the block and head, because that shit is just nasty lol. This would be the bare minimum to ensure a quality rebuild.