Understanding is the 6505 is a 6-7 psi pump and should work ok without a regulator. It's a stock type replacement, and a regulator was not used in the stock set up.
Stock set-up would be fine for the Jeep I would think.
Fuel requirements are determined by peak HP. From that there are charts for pounds per hour of fuel requirements. From that fuel psi and carb needle and seat orifice size is determined. For big HP, pumps with excess capapcity are needed to insure there is no chance of pressure drop at hi-rpm high fuel demand circumstances, so a regulator is in the system to limit max fuel pressure at low rpm and idle speed when an excess capacity fuel pump is used, at least as I understand it. Use the good ol' Holley Regulator, QuickFuel offers them now also, maybe $30 or so. An inline fuel press gauge is needed so the Regulator can be adjusted to set the pressure. Edelbrock offers a Holley Dual Line Kit Jegs #350-8192 for ~$100 I like since it centrally locates the Regulator and prevents interference with the Stock AMC Coil mounting location. The Edelbrock Regulator Mtg plate in the kit positions the regulator up to high though and can cause interference with the Air Cleaner Assembly, so a custom Regulator mounting bracket was designed and fabricated. Pic of set-up on an AMX.
Set-up on the Jeep should work, just will have to relocate the coil.
