On the 216 pump that I converted to a bolt-on 2-groove pulley by machining the belt groove off the pressed-on pulley into a mounting flange, I used a pulley for a 302 Ford V8. It was necessary to re-drill the fan mounting holes to the proper bolt circle, but the pulley hub has plenty of room to do 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!