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B81 update alternator suggestions?

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Have a 1958 B-81 that I'm wanting to update to 12 volts instead of the 24volt system. Deleted the series parallel switch and updated to starter to a MT39. Now I would like to get rig of the generator and instal a alternator.  Looking to change it to a negative ground instead of a positive ground.  So any suggestions on what alternator to use would be a lot of help.  


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I don't even know what model I have.  Got it the same time I got my starter and batteries.  One wire unit, works fine.

I reused the existing bracket, just spaced the alternator to line up and re engineered the slide bracket for adjustment.  Pretty simple.  Then all you have to do is switch the wires on the back of the AMP meter.



1959 B61 Liv'n Large......................

Charter member of the "MACK PACK"


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