I did a cam swap in my 2011 5.7. Block offs. 2500 non mds cam and non mds lifters. Was told it was ?drop in?. When I fired it I got a bunch of mis fires on the mds cylinders. Let?s just say I figured it was a mechanical issue. It was not. Finally I grabbed a challenger tune and adjust the exhaust cam angle and presto no misfires. Of course it?s running rich. I really need a stock 2500 5.7 tune to compare to. I?ve checked the repository and there?s nothing. Not sure if there are any Good Samaritans out there. Thanks