I see one motor p/n number is different than the other. Also, one has a AD70L2, the other 3. Anyone know the differences or why a 05 motor couldn't be put in an 03 as long as the 03 fuel and ignition system is used?
I think you'd be fine. They are constantly changing things and releasing them as "running changes" (cost reductions, reliability growth fixes, etc) that require new engine assy numbers, but really don't change anything for you or me.