everything should be the same.. my wiring harness from my 98 3.0 is on my 03 3.0 in my truck right now, and I have one missing plug. didn't get any check engine lights. I used pretty much EVERYTHING from my truck. I didnt use the ecu cos of the pats stuff and all that crap. pretty much use the block, and heads, thats really only thing I used, and everything worked. only thing that changed would be the nice non plastic (idk what its made out of) intake manifold on my 98 compared to the cheap plastic pos on the 03. which I switched the 03 lower intake, to my 98 so I had the nicer one. blah, felt like I just rambled on and didn't get anywhere lol.
2004 Ford Ranger: 4.0 5spd 4x4 - 33's on 17" fuels.
1987 Ford Ranger SXT: practical daily build including motor swap and full widths.
1988 Chevy S10: 350/465/205 + full widths - tube chassis and 2.5 ton's coming soon.