I used 4 heavy duty padded hooks from Home Depot. They are called "Heavy Duty Arm Hangers". In my Home Depot they were near the tool boxes and shop vacs.

I did not use the hardware that came with the hooks, instead I used some 1/4 x 2" Lag bolts. I bolted the 2x12 to the studs (in three places) with 3/8 x 3" Lag bolts with fender washers

(Note: Since I installed the hanger isuadam on jk-forum suggested a third hanger for the heaver front doors. I have since taken his advice and added a hanger between the two on the right.)

Install Notes:

Finished:

With The Doors:

Close up:

Side View