Opinion on Clifford mods for Slant 6 motors

My first build netted me 158 rear wheel HP. That was mild head work with a.100 shave.Comp cam @.425 lift. Clifford intake,Edelbrock 500 CFM carb, headers,2/12'' single exhaust ,stock bottom end and 3.73 gears in a 67 Dart. The dyno operator took a guess at about 210 HP at the crank.