In that case, I'd be tempted to drill and tap a disc of 1/2" or 3/4" steel plate for a puller screw and make a dedicated puller just for crankshaft and/or camshaft gears. Of course, I'm always thinking of doing several engines with the same tooling. Got a dedicated drawer in the tool box for home-brewed toys like that!
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!