The only real ***** about it is the mating the Chrysler wire harness with what the Holley wants.. key on and run it a discussion all on its own. Also get a higher amp alt. To support everything if you have a stock one. Fuel pump, fan, ecu etc. Good voltage regulator. My slant 6 one didn’t keep up, went with a 74 model. Holley sells a drop in factory tank 255 pump in the factory sending unit. No return line needed with that unit
