fold up a "C" section in 4mm, make the lower edge on an angle to clear water and enclose the ends , weld some plates on to pick up the chassis rails
Space it back from the doors and position your stub axle,
You could even make the rear bar out of 100mm x 50mm rhs very solid,, the Arms to hold the spare wheel can be 76mmx 40mm rhs,
Draw it all out its not chicken surgery lol
http://www.ebay.com.au/itm/SWING-AWA...item4ada208ffb
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