Brakes should fit... the brake page in the catalog doesn't mention axle models, just 9" vs 10" (police package only) and ABS vs non ABS (and there were non ABS d35s.)
The part number for the right-hand backing plate on a 98 (9" w/o ABS as an example) is 5252 720, it was superceded by 5017 760AA which is the part number for an 01 right-hand backing plate (i.e. if you ask the dealership parts guy for backing plates for your 98 they are going to give you ones for an 01.) Since everything else attaches to the backing plates I take this as proof that they should swap.
That being said, you may want to either (a) upgrade to disk brakes using the ZJ rear disk swap or liberty rear disk swap, or (b) replace the brake hardware at this point anyways.