You can probably swap the nose cone, but you'll need to install a new front bushing before you do. Be careful to get the right "end play" on the armature, as it's critical for correct gear engagement in the flywheel. There should be a slight clearance front-to-rear on the armature, not a tight fit. It's adjusted by installing different thickness thrust washers at the rear of the starter if you need to change the clearance. Be sure the starter drives have the same number of teeth. A mismatch there could damage the flywheel, and then you've got real problems!
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!