Thanks for the info...if you go to cliffordperformance.com, the site is strange. It does refer to cars and to porn.... maybe not a bad combo in some occasions.

Nothing wrong with shaving the head.... think of it as "trueing the head surface" only the machinist takes a little more metal off. I have had a 235 shaved 0.100" before..... with a '54 Corvette cam, it ran really well.....
well for a 235 that is.