[767Jockey]

I'm running the same pair of pumps that Shelby supplies in the 4000 series cars. They have 3/8" input and output fittings. Honestly I'm not even far enough along in the assembly to check if they are plumbed and run in series or parallel. Does anyone know? I have only one fuel tank pickup, it'll be either 1/2" or 3/8" depending on the fuel line size I end up running. I've seen some pretty strong engines in these 4000 series cars, many exceeding my 600+ HP FE. Does anyone know what size fuel line Shelby puts into these cars? I guess the basic question becomes does it pay to put 1/2" line in the car when the inlet and outlets of the pumps are 3/8"?