Don't know anything about interchangeability of these models but consider to get yourself a Chrysler parts catalog of this vintage, there's so many detail questions that turn up during work it's worth every penny. Just got two carbs from another make diassembled for overhauling and used the catalog to check if there has been anything messed around with like putting wrong carbs or jets in. Just unbelievable how many changes there were.
Only problem with that is you need a parts manual for each year to check part numbers. I have a 1978 Chyrsler Parts Catalog but it doesn't tell me if any of the parts fit the other 1974-1977 Formal NY'ers.