Not matter what car you trying to price, it is very hard to determine the price without seeing the car. But I will do my best. The biggest object in the car you want to be original is the engine. BUT, just because the engine is number's matching, does NOT means it original. Today the common term to determine if the engine is original is "original number matching." This should eliminate any chance of having the engine be a number matching restamp. Now lets move inside the car. If the restorer replaced the interior with junk repro parts, and replaced the gauges with units from Mid-America, then your going to have to have to change them (which is big bucks for correct NOS) if your going to show the car NCRS or Bloomington. A new interior for a Corvette from Al Knoch with NOS gauges is close to $5,000+. Your side pipes are a quick fix if your car is from the AO Smith plant or if your car is a non side pipe car from St. Louis. You did not mention anything about the paint-condition so I don't know if the car has crack fiberglass or bondo all over. Assuming that the engine is the original unit, and you have a convertible with possible side-pipes, your looking at a restored car that should be a properly priced at $50,000-$55,000. Unless some of the assumptions I have made are wrong about this car, it should get a little more money at around $60,000. Be sure to look under the car so you can see if any leaks are present. My STRONG advice is write Ray Morrison (the 1966 Corvette Team Leader from the NCRS) an e-mail and tell him the deal. He will give you a VERY honest opinion about the car your looking at. Hope this helps.
-Dan
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