Iron Dog

As is usually the case with prototypes, there is quite a bit of re-fitting, outlining more to cut/sand away, re-fit again, and so on. Do this until satisfied with the "fit" and amount of clearance for your engine application.



Initial trial fit after original opening was cut.



In this and the next picture, I am tracing where I desire to remove more material for curved and symmetrical amounts of clearance around the valve cover; as well as to round corners.





Sanding to my retraced lines and curves.



Second trial fit.



Still not fully satisfied. Outlining some more to be sanded away.