Magnum swap using Magnum alternator

Hey guys,

Working on finishing up my magnum swap in my 1971 Scamp and I’ve got something I need help with. I am running the magnum serpentine belt setup so I will be using an alternator that came factory on this magnum engine. My battery will be in the trunk instead of under the hood.

My question; this alternator is rated for 90amps. My ammeter will be bypassed, this is not a one wire alternator so I plan on using the two field wires like the original alternator did. Is this amperage rating too much for the car even if the ammeter is bypassed?

Also, would anyone be able to tell me where the black wire that attaches to the back of the alternator goes once it passes through the ammeter? I know it needs to be returned to the battery to compete the charging circuit.

I also plan to use a circuit like the one @crackedback has designed. But I am unsure how to get it to work with my application since it is drawn using a 1 wire alternator.

Any help would be greatly appreciated!

Thanks