The new Ultimate Body Mounting Block uses a familiar but improved
design making it easier to use and more universal. This works for JK AND Mossetti chassis, with or without rear tires on the car. Once you've tried it you won't want to use anything else.
Here's how to use it in four easy steps:
1) Flip body jig over and place your chassis on the jig, the chassis can only fit on one side.
Line up the holes in the pan with the holes in the jig, then adjust the
front stop bar to where you want the front of your body to be. We recommend a
1/16" to 1/8" in front of the guide flag.
3) Remove chassis, flip your jig over and place your pre-cut body in the slots and slide it up to the stop you've already adjusted.
4) Poke your holes then you're done .