Head clearance for nr67

[rumrunner]

Does anyone have a good head clearance for a nr67 running 60% nitro ,it comes with .020

Thanks

 

[SayMikey]

Not sure about a hydro or mono but set my scale at .016

 

[Mark Bullard]

Cone plug head about 0.016", standard plug head about 0.012"

 

[rumrunner]

Thanks