You can learn a lot going through Legends Judging... I had seen the ribbed hose in several pictures of low mileage original cars. If you use the still available hose from GM wipe off the inkjet part numbers first. No inkjet printers in 1969. I found one at http://www.newyorkrestomod.com/default.asp but I don't see it on their website now.
The square cut clamps ends are made differently now and have rounded ends, I have heard a small grinder can change that. The one in the picture looks like it was painted Black as there is a small section flaked off.
I wonder what finish would be on a NOS fuel Y block?