3/4 Ton Rear Shock Mount Location

[deepnsteep]

I have a custom CCSB that I need to get the rear shocks mounted to. I don't know the year of the frame, it has a 9.5" 14 bolt (semi floating) rear end and a 4" Skyjacker lift with their shocks. When I put the mount bolts where I thought they should go, the shocks were too short. Does anybody know off-hand or could post pictures of where the mounts should go on the frame? The problem is that I don't know how much stroke should be left in the shock when it's sitting empty...
Thanks!