I recently bought a Helix Mustang II front end for my 65' Fastback. The cross member came as a universal fit. Does anyone have a solid set of blueprints for the crossmember and top hat spring support with dimensions? To my understanding the crossmember should be a set dimension and the variables would be the spring rate and drop or non-drop spindles. Please excuse me if I have made any wrong assumptions as I am trying to figure this out as I go. Any advise or guidance would be greatly appreciated. I will post pictures on my progress. Thanks!