6.4 hemi charging system?

I do not care, generally speaking, for "one wire" alternators.

If you race, they complicate making the system safe with a disconnect

The charge wire needs to be GREATLY oversized, because it is also the sense wire. This means a much more dangerous large wire to worry about in the case of a short

BUT I do know that lots of guys use them. DO NOT DO NOT connect ANY alternator larger than (let's say) about 50A to the old original harness. Make CERTAIN the bulkhead connector is repaired/ in good shape, BYPASS the ammeter, and then run a LARGE fuse/ breaker protected charge wire direct from the alternator to the battery

You MUST research to discover recommended wire size. Obviously, if the battery is trunk mounted, this means that wire needs to be even larger because of length