With a fair amount of tinkering, a 261 can become a 290-something cubic inch engine. That's somewhat better than a 258 CID "216" or a 270 CID "235" if you believe in the old adage "There's no substitute for cubic inches!"
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!