I'm going to go look at a Nova 4 sale. It's a 64 2 Door. I'm looking for a good solid car to cutomize into a resto-rod or Pro tour car, All original is not important . What are the common things to look for? eg: common rust problem spots? What are the differences between 1964 and 1966-67? I've only owned street trucks in the past this will be my first muscle/classic car.