i have fitted the JK bar as they do a specific fitting for the 72 crossover model - the hardware is fine, all the bits fitted, altho the finish and welds are what I would call 'utliltarian' - had to do some special spacing out of the bumper from the irons to enable adequate stand off - only thing I would seek to have done differently is a revised shape of the ball mount bracket as it drops under the bumper, to give better ground clearance than this seems to give - one of those 'coming down the ferry ramp and hearing the grinding from the back end' worries...it wasn't a problem though!
hope that helps, cheers, Rob