Re: 4.7 into 4.7 HO
The only problems you might run into should be listed in my swap write-up in the sticky. I understand you are putting a non-ho in place of an ho. You should use the non-ho PCM with the non-ho, then the knock sensors won't be looked for by the PCM and the sensors that are on your non-ho should read ok. I think you can use your HO wiring harness on your non-ho if you have the same O2 sensors on both of those engines. One or both might have a right and left bank in the y-pipe, I noticed in my swap that the newer HO had different plugs and an additional o2 sensor.
'00 4.7 WJ-4.7 H.O. swap, SCT
'98 5.9 ZJ-vanco brake kit, SCT, hughes intake, DT headers, full Kolak 3" exhaust, 1.25" fr sway bar, 52mm TB
'00 4.0 5sp XJ-ARB/Ox locked, Ford 8.8, U-turn steering, armored, 6" lift