E:
I think you are referring to the CA version of the 12V engine with EGR right?
Since its for off road, defeating emmisions components may not be of concern.
Look way back in the TDR, I think about "Issue 25 vintage" a member discussed blocking off the intake and some creative machining on its interior, uhh porting!
You could also order a intake for a non-EGR engine. IE the Cummins chrome intake maybe more reasonable than oem type part.
You might call a few Banks dealers and see what's in the scrap bin, as they frequently offer a "twin ram" intake. Again this ala carte purchase maybe cheaper than a new intake.
I see them on ebay sometimes for $20-50. I just looked, I have a couple of intakes on engines or heads, but don't want to part with them as they are a package.
You might speak with an electrical guru/research the values that the EGR is seeking to defeat your PCM "ck engine light" feature once you convert the intake. Maybe something as simple as a resistors to fool it into thinking the EGR is still in the circuit and operating.
Art makes a good point, but I doubt Cummins could mess with the code on the EGR truck in (CA or TX) anyway. ART is Cummins messing with the DC PCM or the ECM (engine control module on 1998. 5 up trucks)?
If you are referring to 24 v. talk to Kyle or Bob Wagner (USA Dist. ? for the Mad Marco ECM).
Good luck,
Andy