We ran a Muncie behind a Chevy 327 engine in a "Northern California Sportsman" dirt track race car without a rear support for a lot of years, running 2nd. gear against a 4.56 rear end and going from 3000-7000 RPM at full throttle twice a lap on a rough, rutted 1/4 mile track. It didn't break. I don't think a stovebolt engine can possibly stress one worse than that.
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!