Heres a ghetto fix for the shutoff that I discovered when looking at a 300D to buy - The guy had taken a length of wire, tied it to the shutoff lever on the injection pump, ran it around the front of the battery and into the passenger compartment through a grommet by the glove box. The he would hak on the wire to shut it down. I had to pass on that 300D, there were tons of "creative" repairs like that.

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tgingrich
'83 300TD 282k
'83 300D 239k
'82 300SD 204k
DFW