Robert (RPM) is 100% correct. If you have NO garnish moldings you may want to consider fiberglass. I have seen them and they are "okay". Correct in size and shape, the only thing that would prevent me from using them is I insist on all authentic parts within my projects.The 40-47 PU ones have an entirely different defroster louver. The 39 style that you need has a single and quite large defroster "louver" whereas the 40-47 PU is a longer 'slit' style. To convert the PU (or 40 sedan, same thing) you have to chop for height, change the corner radius's and relocate the counter-sink screw holes. It's a lot of work but it has been done. I have also built the center garnish from scratch, not too difficult. Good luck.