Truck Repair: NTC855BC3, oil line, plungers

Question
How do you tell which injector you have to set it.  The CPL is 632FF-83-94.  

Answer
Top stop injectors have the plungers below the body,old PT injectors have the plunger above the body,& STC injectors have an oil line going to the rocker housings for the injectors.They all adjust differently.Some of the older engines had on the injector lash setting on the data tag: T.S. ZERO LASH. T.S. meaning Top Stop.