Apparently the lower diagram method is exactly what Mopar did to get around the connector / ammeter melting problem once it was discovered. In other words, this is the factory work around and allows you to retain the stock ammeter and run a volt meter if you want.
- EM
Actually, the metal base ones were on the pre late '75 model year trucks. Sometime early '75, in an effort to lighten things more they went to the plastic ones. You have to search for the older trucks to find one of the metal ones to buy.
