I am not sure when the cut-off datye in '92 was for the injectors and smog equipment, you might have to use the 90's with the '92. The dealership should be able to tell you if the two are compatible from using the VIN #'s. Otherwise it isn't that big of a deal, you will have to remove the portions of the engine to get to the injectors to unplug them from the wiring harness. W/either set you will want to ship the injectors out to be cleaned and rebuilt.

More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed