the surge tank is a very good idea, should work great. You need a pump from the main tank to the surge tank, and a bypass line at the top of the surge tank back to the main tank. The 3/8 line from the main tank is fine for feeding the surge tank, but the 1/4" line is probably not big enough. I'd think closer to 3/8" for that also, so I'd have someone mod your stock pickup to swap the 1/4" line for a larger 3/8". You figure the bypass line back to the main tank from the surge tank has to flow enough to handle two pumps (one from the tank to surge and one from the surge to engine) minus whatever fuel the engine burns.
Then you need a second pump from the bottom of the surge tank to the engine, with a "Y" to the rails. I'd probably put a crossover line from rail to rail on the side you don't feed the rails with; i.e. if the fuel comes in the rear of the rails, make a crossover line (either hard line or an hose) to go between the front of the rails.
On the second pump I'd place the regulator right after the pump, in the rear of the car near the surge tank. It will bypass to the surge tank also, to keep the surge tank full. That way you only have one line to run to the front of the car, and there is no hot fuel from the rails being bypassed to the tank.
Jody
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