Stumped with rear shock length..??????

So I have the duster at the ride Height I want, and running caltracs as well. My problem is I can't seem to find a reat shock that fits with this height.....
With the car on the ground the measurement from eyehole to eyehole is 15".....but my problem is all shocks I Find have a compressed length of 14.25 or something like that. This leave no room for compression and will obviously bottom out the shock.
So what do I do. Is there a shock out there I'm missing with the right specs desired or doni have to move my shock mounting points higher/lower, and if so how do I go about doing this.

Anyways this is another one of my problems I need help with. Thanks guys!!!