The only XJS I have driven is my own and it is unpredictable in its handling which I cannot believe was the original design behavior. This is a convertable, no rust, no accidents, 92 K miles, new Pirellis, new front suspension mounts, rear mounts look intact, engine mounts look intact. This car will understeer initially but if I turn back again it will want to "quickly" move to an oversteer condition. I know this is a heavy front end, BUT, this feels unsafe.

Any suggestions? shocks are original and perhaps tired, ball joints appear fine, car tracks straight and does not pull upon braking...