Why do you need an electric pump? If you need it for higher pressures and EFI, I would still use a mechanical pump to draw from the tank and then feed this....
http://fitechefi.com/products/40003/FiTech Fuel Command Center. Coolest thing to come to hot rods in a while. It provides the high pressure via a submerged pump in its own reservoir that you mount in the engine bay (assuming you have room). No return line to the tank needed and a lot easier to wire under the hood than in the back under the car.
This may even solve the problem of having to increase the line size from the tank for some folks. If the reservoir holds enough volume for the short WOT bursts, all is good.
When I add the FiTech GoPort EFI (once it becomes available), I'll be feeding one of these units with my mechanical pump.
