WOULD THIS 100 amp alternator work

"No matter what you do I would eliminate the ammeter! My .02 "
Really , i just bought a new circuit board for my rallye dash , what would I use in place of the ammeter ? I put 500,000 miles on my dart and 600,000 on my 1977 ramcharger 4x4 and the ammeter never gave me much trouble . Is the some big problem with them ?