I run a -8 line from the pump to the regulator, with a -10 return and a -8 to the carb at 7psi. Then a separate deadhead regulator with a -4 line at 5.5 psi. to the nitrous. Mallory Comp 140 pump feeds the system with no problem, and no loss of volume or pressure.
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1985 Mustang GT
'85 GT "Red302" 12.96@107.1 N/A ... Sprayin' for the 11's
2003 Torch Red Mach1 
'68 Fastback ...331 Stroker "Restomod"
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