If it's that close, a taller rotor will hit the cap. There's a big difference in the rotor height, and the tall cap and rotor were used with 12 volt ignition systems that could arc over to the breaker plate when a plug wire open-circuited or fell off.
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!