Unfortunately, no. The transmission and clutch will have to be removed to get access to the bolts holding the flywheel to the crankshaft. Then install a 139 tooth flywheel if it's not there already. A 6 volt starter can be run on 12 volts, but the only other option would be converting the vehicle to 12 volts and installing a 55-62 starter.
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!