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JWL · 11-03-2020, 08:30 AM

If you read my book you will find the Navarro-H&H clearances in your post are typical of the problems I pointed out. There is no easy path to perfection. However, that does not mean your engine will not run just fine. I suggest setting the minimum clearance at .050-.055 when using new Ford rods and a little tighter with used Ford rods but not less than .045.

And, I agree, the sparkplug should be moved.

11-03-2020, 08:30 AM	#14
JWL Member Emeritus Join Date: May 2010 Location: Fitzgerald, Georgia Posts: 2,204	Re: Piston to Head Clearance Input If you read my book you will find the Navarro-H&H clearances in your post are typical of the problems I pointed out. There is no easy path to perfection. However, that does not mean your engine will not run just fine. I suggest setting the minimum clearance at .050-.055 when using new Ford rods and a little tighter with used Ford rods but not less than .045. And, I agree, the sparkplug should be moved.