It's too bad that GM in the US doesn't keep records like GM Canada does. All I had to do was fill out a form with my cars VIN number and mail it to the GM Canada archives. A few weeks later I got a letter back with all the options, paint codes, build date, ship date, original selling dealer and the number of the same model imported into Canada. GM Canada has records for every car sold in Canada since 1946. I found out that my '75 is one of 2887 coupes imported that year and of that only 1067 had air conditioning.

Thanks guys, I am really enjoying all of the feedback.  I've decided that this will definately be a more involved project than I originally anticipated.  The plan was to repair the fender, rusted out muffler and spruce up the interior and drive it.  It looks like it will become much more than that.  I'll keep posting updates as they occur for anyone interested. 

Welcome to Corvette Ownership!! That's pretty much how it always is....and you never really "finish" them...lol