Swapping the knuckle and spindle from a 1981 mini truck onto my 1972. First, I am using the spindle from the 1981, so that isn't the problem. I have in this order, knuckle, spindle, brake spacer (rather than the dust shield), gold shield. Using vented rotors. I know the wheel bearing traces have been tamped down, rear seal in flush to hub. I slide the rotor/hub on, slide in the outer bearing, and the thread on my spindle is maybe enough to get the washer on. Any idea what might be going on? Is there some type of trick to fully seat the hub onto the spindle (seems there might be room there)? Can I put the brake spacer between the spindle and the hub, or I guess maybe I could just eliminate that.