The pics tell the story, but basically, the SWB GQ chassis tapers in at exactly the right spot, and at the right angle to give you a nice lower link that is 5deg shallower in pitch, and triangulated in about 250mm to help flatten out the roll axis quite a bit.
Now that I know it works nice, I have to try and make the mount look as sexy as the one above it that Sam and Sandy at overkill dreamed up

On my setup, changin that link drops the antisquat from ~110% to ~65%
On a standard SWB GQ 5-link rear with 4" coils it will bring it down from about 160 (!) to around 100, but someone needs to try it to see if the triangulation is too much for the panhard to take..