The 322 engine was used in the Buick passenger car from 1953 through 56, in several HP ratings. Yes, it was the "nail head" design, with the vertical sides on the valve covers.
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!