1981 Chrysler Lebaron....

Sounds like the dreaded Lean Burn, a good idea that was tripped up by a bad implementation. You can backdate it to the earlier, familiar orange box by following this article:

http://www.slantsix.org/articles/leanburn-article/leanburn-article.htm

Save the distributor, though - EFI guys like myself can find them very useful.