On my channelled roadster I am running SoCal rear shocks. When the car sits it is 330mm (13.2 inches) eye to eye. With the shock out of the car at full extension it is 360mm(14.4in) So in my mind this shock has only 30mm or 1.2 inches of upward travel. Fully compressed the eye to eye is 240mm or 9.6 inches. With the shock I took off, the bolt that goes through the bottom is very tight on the bushing and I would think that if that is binding the shock is not getting any movement in the arc of travel.The rubber bushing has also split, at least on the outside and I can't get the bolt out yet to look at the rubber inside the lower mount. I think these shocks are a generic design for standard hot rods and because we are sitting so low maybe my upper mount should have been set higher to give more extension. I am running a SoCal transverse leaf in the rear. The rear is quite stiff and I think the ride could be improved with better shock ratings. I will be getting them both tested tomorrow as I wouldn't be surprised if they are damaged because of this setup. Any experts there that can give me some advice.