So my dad is giving his old 1984 Euro 280e to my son. It runs with Starter fluid but really struggles with the fuel distributor only. It has sat for a few years with old fuel that deteriorated the hose and non-threaded fuel system parts that dangle at the back so I was going to tear it down and clean it, using a kit with the diaphragm, O-rings, copper washers etc. This thing has some weird injector rigged up to bypass the fuel pressure regulator it seems? Does anyone have any info on this or if it was done because it was brought into the US? Is there a specific kit I'll need or one that includes the itty bitty copper washers from the spring-loaded thing that threads in before the return and supply line ports?

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1984 280E