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Bob, welcome to the Corvette Forum. You've come to the right place for answers to just about anything Corvette.
It looks like you've posted the same question 3 times now, in the same Forum. You might ask one of the Forum Moderators to consolidate your posts. They're listed at the bottom of the base C3 Tech/Performance Forum.
So, is it a 70, or a 73? DeSoto, Missouri, what about 30 miles south of St Louis?
As others have suggested, do a local search on your internet for Corvette clubs near St Louis. Here are two I found with a quick search; Route 66 Corvette Club - https://www.route66corvetteclub.com/ and the St Louis Corvette Club - http://www.stlcorvettes.net/aboutus.html Go to either (or both) of their web sites and post a question. I have no doubt you will get some excellent and useful recommendations.