[Gearhead999]

As Harold said above. There isn't any matching serial numbers on the engine and transmission. The casting number with the C6XX on it is near the starter and not easily viewed.

The vin on the left fender apron also might not be visible. Two reasons--[1] you have to loosen left fender and pull it out some to see it. Not all the time. [2] the apron has be changed/repaired and the number is gone. All GT's in 1966 had to have a 4V. So it has to be "A" or "K" to be a GT. But, just because it has engine A or K doesn't mean it was a GT. Also, many GT's were fab'd at the dealership. Also, in todays market many standards are converted to GT's to sell better. But, vin won't help you there.