Hey Kemikal embalance I might have an idea for checking your frame. I been a body man all my life but haven't straightened a frame in years so still old school. This is rough but I hope you get the idea. Not good at drawing but if you make 3 of these and attach them to your frame and make sure there even lengths on both sides of the chain. Your frame has holes in the same place on both frame rails so attach one in the rear of the frame, one in the center and one in the front.