Oil sending unit is by the left side of the distibutor cap if you are faceing the truck you will have to take a light and look down beside the cap but you will be able to see it
How do i Recharge AC Unit for a 1998 Dodge Stratus
The oil pressure sensor on the 360 V8 is on the top rear of the engine, next to the distributor.
The speed sencor is on top of the rear diff there is a small unit that is plug in un plug and unbolt or unsrew replace
If you mean the fuel level sending unit, the entire fuel pump module must be replaced. It is located inside the fuel tank, and requires either the removal of the fuel tank, or the truck bed to access it. Either method is about the same headache.
call a professional
they are on top of the fuel sending unit and are not replacable unless replacing the whole unit.
It is in the tank, on the side of the fuel pump module.
The temp. sending unit sensor is next to the thermostat housing under the alternator
Clutch slave is seled unit. replace clutch
If, by ECU you mean "Engine Control Unit", I don't believe a 1968 dodge pickup had one.
It is the two wire sensor near the thermostat housing.
The Sprinter does not have an oil pressure sensor. The oil level sensor mounts to the side of the oil pan.