Iv got a 1999 Wrangler, and Ive found a 1985 cherokee parts jeep for $400, and Im wondering if it would be worth it.
If it was my vehicle and I was intending on keeping it a good while, I would rebuild. There is a good chance the one from the 85 model will need to be rebuilt anyway.
You may have powwer, but do you have a good ground? Find or make a ground for the wiper motor. Good luck.