Which way does the rotor rotate on a Mark 2, 3.8? Thanks

 

Counter clock wise.
And number one cylinder is at the back of the engine.
Firing order is 153624

A way to check is remove the distributor cap _ make sure it's out of gear and the ignition switch is off _ park break needs to be on.
Rest a light near the distributor _ hold a mirror while viewing the distributor and press the button on the end of the starter solenoid at the top of the firewall.
The engine will turn over indicating the direction of the rotor.

 

Thanks.