That Challenger has always been nice and fast! I hope you can find a solution to the problem. Years ago a friend purchased a Magnum Force front end for his Dart and encountered problems during installation but eventually got it to work. He sold the front end to my mentor/ trans builder/friend for his sons Dart and its working well now. I didn't get to see you at Mopars at the Patch , I didn't have my Dart there and my friend was racing my pickup due to a knee injury on my part