Took me a little while searching bits and pieces to do my alternator conversion, so I thought I'd lump it together if anybody else is considering. Nice change and not difficult or expensive. 1300 motor, mounted a GM alt with internal voltage regulator.
Used an alternator for a "78 Camaro w/350" and wiring adapter, straight off the shelf at Advance Auto, $50.... crimp an "eye" on the red/battery wire and connect to output of alternator along with the brown wire to the starter. 1/4" spade on the white wire goes to the blue/violet wire you disconnect from back of orginal alt.
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Take the bottom bracket from the block and cut it back an inch. before and after pic's side by side, note the pencil line on the left:
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Adjustment arm and spacer tube from Pep Boys, $15 (?). Remove the original top alternator mount completely, not needed and interferes. Cut this arm down to fit to the nearest water pump bolt and drill a hole in it. You will need to cut about an inch of the spacer tubing to go between the bracket and the alternator.
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I used the original belt and the "walk on" method because it was tight. The splash guards both mounted back up normal, so I know I have it in the right place.
Turned out to be half the cost of special ordering a replacement Marelli or Bosch and now if it dies, more easily and cheaply replaced.
Grazie!Tom
74 X1-9, 1300
Dayton, OH