Picture worth a thousand words.. I see disc brake on jack shaft and if there a diff. it could go in center with pillow bearing and u-joint on each side..
More or less like this pic. Minus the jack shaft he has over the spool. On road you can get away with a single a arm. With more then a few inches travel you induce some real nasty camber gains though.
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If you have two arms, you do one heim top outer arm. Two heims lower, or one longer bushing. Do you have enough meat to drill them wheels and bore them for bearings? If so you can make them work on a hub