how to get the build sheet??????

[deth_1970]

I just recently saved, a 72 custom deluxe 10, from the scrapper, it was sitting in the far back of a local wrecking yard, no interior, no engine or trans, but it has a straight body, very little rust, and looks like it had quite a few options, but I cannot verify since the glove box door, has been removed and sold,
Here is what I know so far, it came from the fact, with a 400 BB, auto trans, a/c,
now it does have 2 saddle tanks plus the main tank behind where the seat wouldve been , bed rails, its hugger orange and white
how can I determine what options it left the factory with, what might be dealer installed,