Sort of a "belt and suspenders" approach to holding one's pants up, but it can't hurt! On the V8s there was a slightly shorter valve spring used with the rotator to compensate for the extra thickness, but I don't believe that was done on the sixes.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!