What comes in a FSJ RB Rear Shackle Flip?

Todd Grisko (AKA River Beast) designed this kit several years ago. It is a
well thought out and tested selection of components that allows
you to flip the rear shackle of your FSJ to match a front SOA
and yet maintain proper axle positioning and pinion angle.

RB Rear Shackle Flip Pictures

What is the purpose of the two holes in the top of the rear hanger?

Many customers have chosed to use longer 63" 2WD GM rear springs
to increase articulation, provide a longer wheelbase and decrease
rear departure angle. The circled hole is for the stock spring location.
By switching the rear hangers from left to right and using the additional
hole provided the hangers will accommodate the longer springs
with very little guess work.

Please note the above modification using the longer GM springs will move
the rear axle back between four and six inches and will
require fender triming/modifications.

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