I looked up that model number, Grand ZJ, but it looks like the model number you gave wasn't specific enough to research. Cobra has a few models under that with varying options. Also, do you know if it has a weather band? I've been caught out in washes where a weather band could have saved me some stress.
Agree with the 2 hours, I just replaced my radiator in my wrangler and it took about 1 and half hours after cool down. Add the water pump for another half hour since you'll have a ton of room with the radiator out. Its a pretty easy job to do yourself with a socket set and a driveway.
I'll be getting myself lost around Bonanza Hill on Tuesday the 4th of October. That's this coming Tuesday. Who has Tuesday off with nothing better to do?
There is plenty to see and do in the area. Lots of wildlife. Great opportunities for photos. My wife and I will be getting into a few mines. Anyone with common sense is welcome to join us in the mines. If you don't have any common sense and are prone clumsiness, you can stay outside and guard the Jeeps.