I was in #103 years back, sat in it and crawled all over it at my leisure, a great experience. I think the chassis paint WAS blue, but the chassis color of 1072, which I saw recently, is black. Take your pick. They are both authentic. As far as what color the Gulf cars' chassis were painted, you should look on Racing Icons' web site. They did the restoration of 1076 which won Best in Class at Pebble Beach in 2003 and Robert Ash is a fanatic for authenticity. I think 1076 chassis is black, kind of a dull semi-gloss finish.