I agree with Mark. The "high current" is only there when the truck's electrical system demands it. Assuming "normal" lighting, ignition system, heater fan and radio, you will never approach 60 amps from that alternator except for charging a mostly dead battery.
'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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