Re: Spark Plugs

Posted by PackardV8 On 2012/5/19 17:29:14

Answer to question #1 should be Yes. 7/16. NOT 3/4.

AFAIK all cast dome heads have "CD" directly after the number that is cast into the head. If yours does not have "CD" then it's a machine dome head.
thERE ARE SOME stb'S AND SC's that coverf some of this cast dome vs machine dome.