I just bought a 89 5th Ave that has a 318 in it and 24,000 original miles on it. The ammeter is pegging out on it after it starts up. It sometimes stays pegged and other times comes out of it and runs in the normal voltage range. It seams like when the rpms are low the voltage comes down and then up when you give it gas. I know nothing about Chrysler stuff so what do you think it is? Is there a voltage regulator? Is the Alternator shooting out too much juice.