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I used to run a mechanical pump with a regulator, and the location of the regulator was on the driver's side aluminum panel toward the front of the car, near the top of the front suspension. I use an Aeromotive regulator and its been solid. BTW, all of the fuel lines are AN -8 except the ones that go from the regulator to the carb, which are AN -6.
Recently I converted to an electrical pump, so I now have a bypass regulator at the pump (behind rear driver's side wheel) that splits the fuel feed between the line that goes to the front of the car, and the return line to the fuel tank. That regulator is a Weldon, like the pump. I set the rear regulator at 12 PSI, and knock the pressure down to 6 PSI with the front regulator. Seems to work perfectly, although I only have 200mi on this setup.
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