I've found Chrysler ammeters of the 70's to be dependable. However, the nuts on the back got loose with age or weren't torqued enough at the factory. This resulted in excessive heat which melted the plastic housing in some of the trucks. [and electrical problems.] Cars/trucks back then lasted 100,000 miles or so. There were a few exceptions. And, during those years, cars were shuffled thru auctions and the true mileage got 'modified'. The trend back then was to buy a new car every few years. Because cars looked different due to styling changes most every year, your friends would know you were driving an 'old car'. The old Acclaim didn't dim its lights much at a stop light. But it had a smaller alternator pulley [serpentine belt].