The same break-in procedure can be done on a dyno with a series of full throttle pulls at different RPM settings. Everybody's shade tree shop has an engine dyno available like mine, right?
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!