[Dalaigh]

If there isn't an RPO code for the gears it's probably 2.73's. The rear is an 8.5" 10 bolt.

With the 97 rear end the spring perches are going to be different then the 73-87's. If you're not worried about that and plan to weld on new perches, the only other thing I would check is if theres any slop in the pinion and check the condition of the gears of the axle.

Sounds like you've got a nice little rolling project, good luck.