Way simpler to do a 5.7 and take the extra 100hp over the 360. Computer from a 5.7 truck or 5.7 Durango should set you straight. Jonesey, I see what you are getting at, but the 5.9 needs to talk to the RFE: I don't think it's doable. If it is: let me know how so I can boot my 46RE Turd out and put a 545RFE behind my 360 in an '01 Ram.  Interfacing the 5.9 to the later truck is the problem and not just with the trans. But the trans will bolt to the engine, that's about it though.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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