Thanks again everyone for the encouragement, and the positive comments.
bob w - yes, I used 18 ga, or very close to it.....046" is what I ended up using. I'm planning to do a little bracing inside the car, around the seats.
Flipper - thanks, and yes I'll try to be a little more diligent with my pics....in fact, I was thinking of starting this thread over, as I've left a lot of progress pictures out.....I was thinking that it would bore everyone. Maybe not?