You'd need to shorten it. How complete is it? They're spendy if not complete. Instead of shortening it, possibly use a modern wheel that has the offset way out near the body line. Is that Positive offset? Like your 300. Lots of axle width info online. Try Googling it. IIRC its about 4" wider than what you want. Make sure that its 5 on 4.5 axles. It should be. What you want is a '66-'67 Satellite 8 3/4. You have 59.5" wms to wms (wheel mount surface). 8.25's are a good alternative also, if your not building a 600 hp sticky tire car. Disc or drum brake, handles good hp, light, cheap, used in Jeeps. Ford Exploder 8.8 axles are also an easy cheap hd swap. Exploders have 31 spline axles and Posi's are plentiful. Complete w/calipers and Posi are $200, everywhere. 3.20-3.73s are common, 3.08-4.10 where used.