TW members have used these brackets for 30" light bar. I was too cheap and built my own. http://www.4wheelparts.com/Lighting-...FQ-CfgodDQYAYg
The easiest way to mount the light bar would be to use those Rigid brackets or to bolt the lightbar mount vertically onto the aluminum "crash can". However, mounting the light with the supplied mounting brackets in a vertical position means that the light bar will be recessed into the grill opening. IMO, if recessed back in the opening the light from the outer floodlights on the light bar might be blocked and that's why I mounted mine more flush with the opening. Using those Rigid brackets or making your own bracket and mounting horizontally allows the light bar to be near the grill opening.