Bellhousing
gearboc breather and transfer box breather were, when new, clipped to the rear engine lifting eye or a braket on the back of the LH head and are hardly visible unless you look, then front and rear axles you have found and the fuel tank breather(s), one on ealry cars, 3 on later (multi vent) cars with the carbon scrubber and one under the bonnet on the late Cat equiped cars.
Depending on depth, your master cylinders and vac servo, the dipstick has an 'O' ring that needs renewing and the oil cap screwed on tight, there's also a rocker vent on the rear LHS near the bulhead, it has a foam filter.
Battery caps, headlights, PAS reservoir which is vented on the side of the cap on later models (EFI).
Engine ECU and ABS ECU if things get deep.