Any sort of sealer on a gasket where vacuum is present is a pretty risky procedure. Try advancing the ignition timing a couple of degrees to deal with the hesitation, but that might also have an effect on the vacuum and the idle mixture and idle speed.
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!