66 shop manual says 67F or 65F for altitude. The highest number for a 200 is a 69F /67F for a manual trans and the lowest is a 62F/60F with the 1.1" venturi and the taxi package. Dont know if this will help you or not but that appears to be the stock range.
Thanks for the quick post. Yes that info does help. It not only gives me a place to start, but also it lets me know that the current jet that is installed is way too small.
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