Hurst01,

Hope this helps. On my 34 ford I tried to duplicate the dimensions from the 66 GTO that my rear came from. For the upper bars the original bars were aprox. 16" long and 13" between pivot points, center of 1 bar to the next at the diff. housing was 6 1/2 to 7 ". At the frame rails the center of 1 bar to the next was 24-25". The bars also angled up some what from the rear to the rails; I don't have the angle but it was whatever it took to put the end of the bars nearly even with the top of the rails. For the bottom bars the originals were aprox. 25" long and 22" between pivot points, and the frame mounts made to keep the rails parallel to the ground. The spread of the bars at the diff. was what ever needed to keep the bars perpendicular to the rear and mount to the rails. I used the coupe for nearly 20 years with that set up and am using the same dimensions in the rebuild. If there were flaws in this set up I was too stupid to see them.

Jack.