I built my first stroker engine in 1963, a flathead Ford with a 49 Mercury 4" stroke crankshaft, and I've changed strokes up and down several times since then. Just be sure the engine works on paper before you start whittling on the crankshaft. One of my most successful stroke-change engines was a destroked 305 that ended up at 255 cubic inches. That one would run close to 8K RPM on a small Holley 2-barrel carburetor, about 1,000 RPM faster than the guys running 350 Chevy engines on the same carb. Nobody could figure why I could outwind everybody else down the straightaways, and the tech inspectors were too dumb to figure out what I was doing.
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!