Andy
My rear shocks are from a FO or F1 CB, I length was same as the K6 shocks I took of 13.25 inches. I think the ride height is close to stock.
I liked the way the progressive shocks worked in conjunction the the fork brace and emulators worked on Johns K8. The bike seemed much more willing to hold the line I wanted in some great switchbacks on NC80. I did not notice anything I would call too stiff in the 25 miles I rode John's bike.
The Tail rack is an EBay find for 8.95, from a HD of some kind I think. I bent the front mounting tabs around to mount to the upper tail light bracket bolts, and added two aluminum turnbuckles that I crimped into the rack and attached to the Taillight lens retaining screws.
The bag is a Marsee I picked up at a Ducatti dealer.