Hmm... well I know the fuel cell is overkill, I just want it
As for the lines... my 260z was originally carburated, and I was under the impression that the lines used for carbs were too small to properly "support" EFI, even in comparison to the 280z lines.
On a side note, I think I need to work on how I drive the car. When I was re-tuning for the new pump, I noticed that I was getting a lower PW cruising around town between 2000-3000 rpm than I was cruising below 2000 rpm. I guess this means I've been "lugging" the engine and using more fuel... I only get about 14-16mpg around town. The motor just sounds better cruising around in 3rd than it does in 2nd between 20-40mph, but I guess it's not as fuel efficient that way *shrug*