I've talked to a few Mopar guys who have worked with Mike on cams. His customer service tends to be really spotty. Sometimes he is quick to answer the phone and other times he can't be found. He does seem to be pretty good about picking the correct lobe for the application. I first used him in my 514 dyno mule and he talked me into putting some rocker ratio into the engine. His point was that Mopar guys get used to 1.50 rocker ratio and they just give away a bunch of advantage to the BBC engines. I decided to try it so I stepped up to some Jesel 1.80 rocker arms and the engine picked up a ton of power. After that I switched to Comp lobes and worked with Dwayne for the specs. But for that engine, with those heads, the rocker arm ratio was the trick.