what about the 89 fox makes it different from all the other year foxes? ive noticed when browsing parts online that somethings only work for 90-XX years?
Between 89 and 90 there were a few changes....mostly interior. The interiors changed for one, smaller headrests, different dash, addition of airbags and removal of tilt. Colors changed as well.
That's about it really. The bigger fenders started in 1991. Mass air began in 1988 (cali only)
Personally, I like the older fenders better appearance wise, the pony rim fills the wheel well better. But yes it can limit your wheel/tire size once lowered.