Need info on Duster

Hey guys, I just bought a 1973 Duster 340. The problem is I'm lacking on information for this car and it's affecting my build. Ex: It has a vinyl top but since I don't know how many came like this I'm not sure if I should replace or eliminate. I do know that there were 15,731 Dusters made in 1973 but that's it. I want to go all original on this car with a frame off resto, and tweek it here and there to make a "me" car. Any help with information, advice, or parts is much appreciated!