Harmonic Balancers

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IIRC the cranks are the same for the F and the 2F, so the crank pulleys should interchange.
GL
Ed
 
The only caveat I would add is...Get at least a 2 groove pulley, preferably a three-groove.
The crank pulley is the limiting factor on adding things like PS, AC, onboard air...etc.
I was lucky enough to have a motor that had a 2 groove pulley when I added PS to my '66.
GL
Ed
 
The 73 balancer will have one narrow pulley [for the air pump, outboard] and one wide one for the alternator [inboard]. If you mount it to a 2F, you will be driving your alternator on the narrow pulley and have to change the pulley on the alternator to match.
 
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