I am looking into the possibility of purchasing a 1971 Camaro Z28. I had another classic car, but sold it since I really wanted to get a Z28. I found one that is in fantastic condition, but the engine, transmission, etc. has been extensively modified. These modifications were very professionally done and the car was rotisserie restored. While I understand original would hold it's value better, I wanted to get feedback about the ability of a car that has been modified to hold its value. Any feedback would be greatly appreciated.