I also think my truck may have started life as a two wheel drive, and possibly an automatic (at least the body). I'm not sure if it is even on the factory 1983 frame. I get the feeling that it is made up of numerous trucks and parts that were cobbled together. If you can, post a picture of your z bar with a tape measure beside it, so I can compare the overall length, and mounting points for the linkage connections. Someone modified the frame side pivot ball to extend it, before I bought the truck, and the weld on it broke, disabling my clutch. That's when I discovered the z bar wasn't long enough, or the frame side is bent outward. Thanks in advance.