[greg64]

Greg, sorry you had so much trouble with the flares. I think your solution will work fine. About the fuel line size, either will work, especially on the pressure side of the pump.

For contrast, I connect fuel filters (for carbs) upstream of the pump, on the suction side. My thinking is that if it ever leaks, it'll suck air and not leak fuel, which might lead to the engine stalling. A leak on the pressure side of the pump could be bad (although really, the pressure is really low).