On the positive side though, the main difference in the rear 2-4s carb between 64 and 65/66 is the kickdown setup for the transmission on the throttle arm. Since the car is a 4-speed, that is a non-issue. So if someone was looking to buy this car and restore it into a driver, that carb setup will work just fine on that car. Paint the engine red, put a 66 water crossover, fuel pump, and valve covers on it, and most people would never know the difference (unless they looked at the numbers on the block)