I just purchased a TCI 4 bar setup for the rear of my 1951 chevy 3100. I am having a hard time believing the bar that the shocks bolt to is correct. The instructions say to drill a hole throught he top frame, however the bottom hole on the frame will not be a straight shot from the top hole. This makes the bolt not set flat on the frame. This also makes the extensions where the shocks bolt not level. Has anybody ordered this kit, and was the bar round or square?