Can you put a mechanical pump on a 3406BPEEC engine?

Well listen to
him

 

Yes, all the gauges in the truck should be on their own for the truck and are not tied in to the ECM. Once you use the keyed power wire from the ECM harness you can connect the two ends together and leave them, and remove the ECM from the block. There are fuel lines though the ECM that will need to be routed like a normal mechanical.

KWs seem to be the easiest to convert, they use an external TPS and still have a normal pedal.