I actually called Johnson lifters today and spoke with a guy in their engineering Dept, Joe Lewis. Nice guy and lots of knowledge. Found out that Hi-lift Johnson's are not a product of Johnson lifters. There's some legal **** going on there but none of my business. Also spoke with S&SS today and they do not have an EVO lifter that can handle hi rpm's. Any ways Joe from Johnson had told me that they do not make lifters for Evo's any more. That product line was sold. He did recommend that I speak with a guy over at Fueling. So after about a 20 minute discussion on valve trains with luke@Fueling I found that I have more research to do. That guy made a lot sense, great knowledge there. I do believe I'll have this sorted out in no time...