oh man we have all been there. it took me 6 months one time to fix a car where the brakes didn't work worth a crap, and it ran super lean
after replacing every single brake component, the maf and map sensor, and resealing the intake manifold chasing a phantom vacuum leak, i found a hole in the *(#$t brake booster
why don't you take a break and work on the WJ? i have one of those man it's my favorite side project