later model 78 amp alternator?

Hey guys,

i have a ''74 Plymouth Duster

i have a round-back alternator on it right now, but one with the 2 field connectors.

i have seen a new 60 amp alternator on rockauto

but i also saw a 78 amp model a few years later

is it possible for me to put the 78 amp model in my Duster? they're both squarebacks

for the couple bucks of difference i get 18 extra amps, sounds good to me!

also, isnt it weird for a 74 duster to have a round back alternator? werent the round backs discontinued somewhere in the early 70's?