I'm replacing the oil pump. my question has to do with the center gear ( with the keyways, that rides on the crank shaft). if you slide it back it sits flush with the center sprocket but sliding it forward it sticks out a bit, not flush. when assembling this piece does the flush end face the rubber seal ( towards radiator) or does it face the oil pump cover plate ( towards engine block)?

this pic shows the center sprocket slid forward to the not flush position

 

You may want to post this up in the DII section of the forum and also your truck's birth date.... Not sure if all DIIs are created equal.