I'm old school I like the ammeter (& an added voltmeter) so I'm with Nacho's bulkhead bypass along with cleaning/checking EVERY connection (time consuming though) and since I never have a high flow (charging or discharging) I have no issues. At my age I dont even listen to the stock radio anymore . I'd rather listen to the eng (& my thoughts). If I had alot of draw inside the dash like you I'd run the batt positive over to the alt w an 8ga wire w a 12 ga fusible link which would alleviate the bulkhead shortcomings but would disable the ammeter