OK so I'm gonna start threads for each ATC 200x I have the first is a mild build which is gonna be completely tore down and rebuilt with all reasonable parts. So I have a brand new top end I was going to use on my other x but it runs too well to tear down. I have sent my core to web cams to get the hottest cam that doesn't need the rocker box modified specs .375lift 280duration and 250@.050 hopefully run a larger carb and a DG RCM aluminum exhaust