Notice the ammeter only shows current flowing to or from the battery.
Pegging it either direction indicates a big problem.

Because you have EFI and pumps to support it, discharge during start will be higher than a normal car and rechanrging after start will be proportionally higher as well. How much draw from the EFI and pump should be in the documentation.
Adding a parallel wire from the alternator output to the ammeter's positive post will reduce the load on the bulkhead connection both during start and during recharge.
Another paralel wire from the fusible link to the ammeter bat terminal wouldn't hurt if you can make a good crimp at the link.