74 450SL in West Texas. I need help identifying a part. Coming out of the bottom of the fuel pressure regulator is a line that goes to another regulator looking deal. This thing has what looks like a pressure adjustment screw on it and it is about 10” away from the fuel pressure regulator. I’m guessing that is the return line out of the bottom of the FPR but not sure. I read somewhere on here that d-jets don’t have accumulators (dampeners).