I have a "54" 3100 pickup and when I look at it from the rear the cab is leaning to the left. When I look under the truck the shackle on the right side appears to be standing up better than the shackle on the left side I notice there are rubber bushings in these shackles could it be as simple as worn bushing when I measure it is a good 1/2" - 3/4" difference from the frame to the cab from one side to the other? Any sugestions, what else can I check?

Thanks
Mike