Back to basics...A couple questions on my New A body!

I did an ebay search and found item # 300189014759, which I think is the car you bought. It's hard to tell for sure in the engine pic but it looks like a disc brake master cylinder. I imagine you have the 7 1/4" rear, particularly since the seller is offering an 8 3/4" rear for $300 to the winner. The car looks good in the pics. Hope it's as nice in person. I think you probably got a pretty good deal on the car. If I were you I would take him up on his offers for the extra parts.