98 should be 4 bolt, pretty sure the 8 bolt started in MY99 but they are interchangeable, I've put a 98 4 bolt straight into a 99.
RA box are a bit of a pain for daily driving, 5th over the line at drags & about 3,500rpm at 100kph.

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Beaten up old 98 Gen 2 Liberty, 13.0, stock V3 STI running gear.
07 Transit motor home
69 VF & 70 VG Valiants needing full restoration
Yamaha Zooma 50cc rocket hopefully going with the Transit.