[DAVID GAGNARD]

Using a higher amp alternator is just added insurance you have enough capacity to run everything............and not maxing out your alternators output.........

With that said, I've been using a standard $19.95 Auto-Zone Ford old style 60 amp alternator on my 65 fastback street car since 1995, no problems so far............

I have in the car the following:

MSD ignition with MSD dist.
windsheild wipers
heater
headlights
turn signals/horn
cigarette lighter
am/fm radio w/cassette player
one 18" diameter electric fan off a Caddy.

Alternator powers everything fine,but, I rarely drive the car at night and never in the rain at night.........

A 60 amp for the application would most likely do the job, 100 amp would do it better by not maxxing out the alternators output.......

David