Tachometer 92' Cummins W-250
#4
on the front crank pulley i believe there are there is the magnetic pick up ...91 and later i think.from what i remember its on the drivers side right by the front of the oil pan
look in the sticky
look in the sticky
#5
There is a crank position sensor on the front of the engine. Make sure it is gapped properly at 0.050. Fill out your signature so it is easier to help you later. Is the truck stick or auto?