the haynes manuel, or google this is what i found.holding the centerline of the base slot in the 1 o'clock position Distributor Pre-position - All Engines
Continue to engage the distributor into the engine. The rotor and distributor will rotate clockwise during installation. This is due to the helical cut gears on the distributor and camshaft. When the distributor is fully seated to the engine block, the centerline of the base slot should be aligned to the clamp bolt mounting hole on the engine Distributor Engaged Position - 4.0L 6-Cylinder Engine
The rotor should also be pointed at the 5 o'clock position.
It may be necessary to rotate the rotor and distributor shaft (very slightly) to engage the distributor shaft with the slot in the oil pump gear. The same may have to be done to engage the distributor gear with the camshaft gear.
The distributor is correctly installed when:
- the rotor is pointed at the 3 o'clock position (2.5L engine), or at the 5 o'clock position (4.0L engine)
- the plastic alignment pin (or pin punch tool) is still installed to distributor.
- the number 1 cylinder piston is set at top dead center (TDC) (compression stroke)
- the centerline of the slot at the base of the distributor is aligned to the centerline of the distributor holddown bolt hole on the engine. In this position, the holddown bolt should easily pass through the slot and into the engine.