I'd use the 235 gasket. Without corresponding holes in the block, the steam holes won't have anything to line up with. No harm, no foul. The 848 head would be a better choice, if you've got both numbers to choose from.
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!