1) Louvers were available with or without vinyl tops. But if it had a vinyl top it had to be black.

2 I'm not following you. Seems like you are making a big deal about nothing here. You want to make up a rare or unique car, so just do it. What does it matter that it could/couldn't be available? It's not a factory car anyways. You'd put 71 stripes on a 70 and then worry that you couldn't get a certain color or top or interior?