thanks for the recommend renntag - i'll prob go with dudadiesel- im adding a FPHE to both my 240Ds so they look to have good options. thanks for the clarification of the hose sizes, etc too- makes it easy to reference when ordering parts! i believe i have the 616 in my 240D so i think 5/16 fuel and 5/8 heater hose. i'll probably go with 20 plates.
where did you plumb in your FPHE?
the 240s are pretty straightforward,
the water pump sits on the head, and goes to either the radiator or shoots off to the heater core... i think its a matter of tapping in after the water pump , before the heater core and then again after heater core where it goes to the back of the head...?

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1981 240D ... 265k
1977 240D ... 265k
1977 240D ... 250k