That only applies to original-equipment installations that were factory-balanced. Once the clutch and pressure plate gets changed, where the clutch cover gets positioned in relation to the flywheel is immaterial.
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!