When Mike started posting on Moparts he came on pretty strong in some of his posts and to myself I said ya, ya, ya. Heard the story before BUT I bookmarked his website and would drop in once in awhile. With small cams I was always able to get it within a tolerance I was ok with. But not this time. I was jumping from a 550 lift solid lift cam to a 670 lift roller cam. I spent 2 full days in the shop with my 408 trying every trick I've ever tried. I was at a point of either going with a different cam or giving Mike a chance. Called and talked to him and ordered his system and all is well. Call and talk to him and you WON'T be disappointed. I will post more on this after this weekends testing and race.