That is a beauty tractor.
It is the Uncle of my 130.
I have a couple 12vdc starter/generators for 10hp Briggs engines.
I suppose if the pulley can be fit to the shaft it might work, although maybe not enough rpms.
By no means, would I try to convert that tractor. With mostly original paint, no heavy field work in its history (plus being able to trace its history back to when it was new,) and a late serial number, it could very well be one of the most, if not the most, pristine original condition Super A's out there.
It should be noted also that the remote hydraulics, while a nice feature and nicely done, are not original IH.