[Christ]

Any D series transmission wil bolt to a D-series engine, b to b, etc.

If your 98 has a D series, either the HF or VX trans will bolt in, with one or more caveats (always something...) The HF has a cable actuated clutch linkage. The hydro setup won't blt on, but it can be modified easily to work reliably.

Axles- the Trans sides, I believe, are ask the same for 5 speed D Series trans, but if they're not, you may need to swap inner cv joints. I strongly believe your axles should fit right in.

Mounts- the bulk of the engine/trans weight is supported by the trans, which has 2-3 mounts, where the engine only has one. Your existing mounts may bolt to the new (older) unit, or not. I can't remember.

Clutch- Your original might work, and the pressure plate/diaphragm definitely is ok, but the friction disc may not work, depending on which trans you get. 88-89 HF have a different spline count in the input shaft than 90-91, and no idea about the VX trans.