I bought a 1965 Cuda 273/235 and after the warranty was out I spent alot of time underneath it,13 rearends, b4 i found a big one off a 1966 Dart to put in. The only primer and it was light gray was by the driveshaft tunnel, the rest of the underside was painted same color as car. And it looked like it was dipped with runs and etc.But that was 1965 and it could of been built in Canada because the medium blue paint matched 1964 not the 1965.