Alternator Capacity for 1968 Dodge Dart 270/SL-6

another quick question pls....

(a) what is the capacity of the OEM alternator for my 1968 Dodge Dart 270 SL-6??. P/N is 2642537 per Chrysler Parts Catalog

(b) I replaced the above alternator w/ a 60A re-manufactured unit. Now when I start the car the AMP meter pegs to the RIGHT and slowly returns to the "middle". Battery voltage is 13.8 vdc and w/ lights ON, points in the middle (Good). Voltage regulator is the newer solid state type, well grounded to chassis.

Don't like the immediate "peg". I guess the starter motor is causing this. Lots of amps initially for start of engine, then, back to normal. Weird I think.

Any idea why I am experiencing this? Does not happen w/ OEM alternator.

Great forum, great people, great MOPARs...thx again