That is a generator, not an alternator. It is a 12 volt part according to the red label. 6 volt generators have black labels. These guys are near Santa Monica and advertise the kind of services you are looking for. I'm not recommending them, just saying they are nearby and should fit your needs.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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