1968 gss 1 of 48

I have been around 13 of the original 68 GSS Darts and none of them had an electric fuel pump so I don't know where you got that info. I was involved in restoring 3 of the originals, one maroon, one silver, and one yellow and they did not have electric pumps. There are not many changes that were made on the cars, basically a custom motor mount on the drivers side and 67 383 A-Body exhaust manifolds were used on the 440's. Everything else was 383 GTS parts already used on the cars. They were all automatics with 8-3/4 rears. Just build the car as you would a 383 GTS, add the 440 with the correct mount, then buy a reproduction sticker and put it on the trunk! I would use modern under chassis headers, that is the only difference that would be worth it.