Heath wrote:Shackle reversal, never did one on my zook but it was always on the cards. if you look at the front of the wagon when you hit a bump the wheel has no choice but to travel up wards and forwards, with the shock being transfered back into the rear spring mount (pin). This means the wheel is travelling against the path of resistance and the ride is harsh. By moving the shackle to the rear the whell can now move back and up when encountering a bump which smooths everything out a lot.
...yup, what Heath said. They improve your handling on-road, and make a more capable vehicle off-road.
I have a few sets of the Man-A-Free shackle reversal kit for '40s if you (or anyone else) is interested.
http://www.man-a-fre.com/parts_accessories/shacklereversalkits_fj40.htm