Drilled the rivets to split the body away from the chassis, and swapped a set of wheels from Matchbox Ford work truck for “1st phase”. Split it apart again and notched the plastic “interior” piece to drop it down on the axles for “2nd phase”.
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Mike L confirmed in a Tweet that the Base Bronco uses the 16x7 Ranger steel rims. They have a 6x5.5" bolt pattern, 55mm offset and a 93.1 mm hub bore.