Conclusive info on 4D56 head onto 4D55 block info?

[dancinggecko]

Hmm, that's interesting. The large injectors were only used on the early 4D55 motors, never on the 4D56. They went to the smaller style of injectors starting in 84 and used those up until the switch to common rail direct injection on the newer 4D56.
With the injectors they are completely rebuildable, we redid the ones on mine a few years ago. You can get new nozzles from Scheid Diesel, once you get those it's just a matter of getting the injectors shimmed to pop at the correct pressure

[Balcorn80]

Yeah the large injector heads were only for 4d55.
If the 4d55s went to smaller inje tors and wastegates turbos after 84... That must mean the motor I pulled from my 85 must have been an 83.

[weelsey]

The large injectors were only used on the early 4D55 motors, never on the 4D56.

dancinggecko, do you have part numbers for those larger injectors you could share here?