I'm hoping to be able to get an engine built up with a 3/8" longer stroke and considerably more compression pretty soon. It will have much lighter weight reciprocating parts than a stock stovebolt, which should allow RPM somewhere in the 5K+ range. A 261 with a 60 overbore and a 4 5/16" stroke comes out to 299 cubic inches. That should be an interesting combination, especially if I'm successful at building one of those engines with a roller cam and roller bearing rocker arms.
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!