Sooooooo.......I used to live out West, was in Cali for 12+ years. Ran Rubicon 1-2 times/year for probably 7-8 of those years. I ran an ‘84 Toyota pickkup that had all tube instead of the bed, 37’s, Diamond axle front/IFS rear and then later Dana 60’s. Dual cases, mild 22R, manual trans. It had a ton of time just tuning and driving it, was very well sorted, and could hang well with rigs on 40’s and better.
Few basic thoughts:
1) Trail is long and not as hard as it used to be, but is still a real challenge. For anything on less than 37’s and built, you will be well challenged and need to pay constant attention. Make sure your rig is well sorted for multiple days of constant wheeling. If it leaks, fix it. No one wants fluids all over the trail. If you’ve got a big V8 and small gas tank, plan on bringing fuel with you. If you’re prone to breakage, upgrade before you go and put some hours/miles on a new build or components before you go. The trail will find your rigs weak spots and if you don’t know what they are or carry spares, you’ll be in for a long trip.
2) The basic rule is 33’s and at least one locker. BUT that rig will struggle unless the driver is very experienced, knows the trail, and the rig is well sorted. Especially a full bodied rig like a FJ60. For those who have never run the trail, and don’t run lots of challenging rocky trails, 35’s and lockers front/rear are a good place to start. A winch is a must have regardless of how built your rig is.
3) You pack out everything you pack in. Food, trash, your own waste. WAG bags are a must. There are little cardboard toilets we used to use, take it, go a few hundred feet away from camp and behind a tree/rocks, and leave the trail cleaner than you found it.
4) The trail is truly beautiful. Unlike anything on the East Coast. Its at 6000-8000 ft if I remember right, and if you’re not used to the altitude, you can get winded running around. Be prepared, sort out your rig and gear, and it’s a completely amazing place.
I’m more than happy to share experience or answer questions. I’m by no means an expert, and it’s been 5 years since I was there, but i’ll try to help if I can for those really interested in making it out there.