So in the process of a complete assembly of the rear of the cuda, built a frame jig, made the mounting points based on a datum line diagram I found online of a 1970 barracuda, the rear mount should be at 15 7/16, well I can't get the rear quarters to line up even closely unless I crank the rear rails up to 18 3/4 - which is close to the middle of the rear frame rail height. The jigs other mounting points are at at 6" in the middle and 14 5/16" in the front and is mounts just fine. The rear deck height is also included - the hinge mount to deck is at 13 12" inches - so that's good also. anyone else have to crank their rear rails this high?