The "short VS tall" issue coincides with the switch from 6 volt to 12 volt ignition systems in mid-year 1955. The taller cap and rotor was needed to avoid "flashover" of the spark from the rotor tip to the distributor housing in case a plug wire open circuited or a wire fell off the plug. The 12 volt coil was capable of producing much higher secondary voltage than the 6V system it replaced. Electronic ignition systems produce approximately three times more open circuit secondary voltage than a 12v point system. As long as the plug wires are in good shape and they fit snugly onto the plug terminals, either style can be used. Take that "tech net" information with a big grain of salt- - - - -most of it is plaigarized from other sources, with no attribution, including the information on the electronic distributor conversion.
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!