Need a Part Number

[Gadejfan]

So i was out screwin around in the mud with the bronco II and i busted my crank seal:/ Not the rear one but the front one! Oil was leaking right where the crank pulley goes into the engine. Does that shaft go into the harmonic balancer or in the timing cover or both? Either way i need the part number for the seal around the crank pulley shaft right where it first goes into the engine. Thanks for any help!!!