I've done some searching but I couldn't find anything definitive.
I have an '89 YJ Laredo with a 4.2 258ci carbd. My harmonic balancer was about to fall off today so I took it apart and I got a Dorman 594-018 from a local parts store. This was the wrong part, the other pulleys didn't line up with it.
I can't find any Chrysler part numbers or any aftermarket harmonic balancer/crankshaft pulley/vibration damper for this model year YJ. All I see are "sleeve repair kits". This model has a serp belt.
All help is greatly apprecated on my DD.