Mopar battery dress up kits and cap color chart
Interesting. I have always had the yellow caps on my battery topper and resto batteries but according to the chart and from what I saw on Hamtramck Registry, GREEN caps were standard for 1971 340. The higher amp alternator was optional and standard on AC cars. Mine has no radio so I assume it was the 37 AMP alternator. I guess I am getting green caps !