it worked perfectly, the guy is a genius. He just took an old NA EFI harness, the Nissan wiring diagrams, and a couple other odds and ends and it was sitting on the floor idling smooth with cool blue flames coming from the manifolds. The EFI harness connects into other harnesses and he figured out which wires connecting to the EFI harness had to have power etc to them for everything to work right. We just sat a fuel pump in a jug of gas. Although it isn't shown on the picture we do have a radiator that we fill with water to go on it.