Some dyno testing you guys may want to follow on YouTube

273 said
Up to .450 both the cnc and stock SM are very similar, stock SM probably wouldn't lose too much to the cnc with a .500-.550 cam maybe 450 ish hp similar torque. Some porting probably pretty close to one another.
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Yep. Once you get a port half assed developed you learn you won’t find much below .300 lift no matter what you do.