Rick, why do you regret selling the 360? What sort of terrain are you riding in? (my husband's trying to work out what to do at the moment, 97 360SX - he's finding it takes too much out of him & often steals my KDX for an "easy" ride where the bike doesn't want to take off leaving him behind - he's about 70kg/140? lb). I know the EXC & SX's are real different, but your comment has awakened my curiosity (I don't want him to regret changing bikes if possible).
As for his bike, FMF pipe & muffler, decompression hole (new cylinder - yes the 380s have the hole stock), 10oz flywheel weight, stock suspension.