Term is correct. Are there set-screws in the king pin bosses holding the KP in place? if so can you remove them and see flats in the KP? again if so, liberaly spray penetrating lube thru the hole and any place the the KP comes it contact with. Let soak and with a drift, tap out KP, direction of removal depends on whether the KP has a head on it or not. If there are no flats on the KP (looking thru the holes) be careful on removing as the set screw has buggered up the KP and can scarf the boss and the bushing during removal. Otherwise, its still spraying it with PO and slowly turning the spindle to break loose any corrosion between the bushing and the KP. If the KP is stuck to the bushing, and the bushing itself is rotating in the spindle yoke, then the spindles need to be rebushed and sized (may also need new KP's) If you can post a pic of the spindles to determine what brand they are so you can get the right parts. possably 30 yrs on those KP's and bushings on a heavy front end, good time to refurbush them anyway. Unfortunatly these parts only get greased once and then forgotten or some people prefer not to grease them because they can attract dust and dirt and wear the parts out.
Had a customer with the same problem come in to the shop. The spindles were really tight! so tight that the increased leverage needed caused the steering box mount to crack--- check that
