Round Back Alternator Rebuilder

according to my FSM for 1970:
alternator amps for 198 and 225 - 26 +/- 3amps
for V-8 - 34.5 +/- 3 amps
for vehicles with AC - 44.5 =/- 3 amps
for Special Equipment (fleets) - 51 +/- 3 amps (NOTE- these vehicles had a factory bypass of the bulkhead connections for the main power wires, which were passed through the firewall in 2 grommets)
the +/- 3 amps is to recognize the variations in temperature. Current output is measured at 1250 rpm and 15 volts at the at the alternator. If measured at the battery current output will be approximately 5 amps lower than the above values.

good luck finding a replacement alternator that tests out under 90 amps. They think they are doing you a favor...