They are easy to work on if you are decent with a wrench. And they can be surprisingly reliable. I use my 1946 CJ2a as my daily driver since spring of last year. The factory "go devil" engine (which has less power than the engine in that 3b) is ok, but it's certainly under powered once you put taller tires on. I put an overdrive on it with the factory 3 speed, and I can keep up with traffic on surface streets no problem. Freeway, not unless you want to be the road block in the right lane as people pass you going 20-30 mph faster than you, haha! Comfortable top cruising speed is probably 50 on a flat (or down hill!) road. but I usually keep it down to 45. Mine has 5.38 gears, and a 'redline' of probably 3000rpm, not sure what yours will have. Although for cruising I keep the RPM under 2400 or so.
Go for it though, they are super fun vehicles. I drive the 2a every day now, and the TJ just gets driven offroad and on longer trips. But you must realize, these vehicles weren't intended to last 60+ years (probably not even 10 years, haha!), so you will be periodically replacing/fixing things. Consider it normal maintenance
Fortunately, new parts are usually pretty cheap. www.walcks4wd.com
is an excellent source for parts. And mechanically/electrically, there's not near as much stuff on these jeeps as your TJ. So that kind of simplifies things.
Honestly, when I purchased mine, I had no idea what I was getting into. But I expected it would be alot of work. Fortunately it was already in pretty good running condition. I replaced the ignition and some of the wiring, added overdrive, got rid of the hard-as-rock bias ply tires and put Radials on there, and new seats. It's quite a nice ride, although a slow ride
Overall, it's been a great vehicle, and I have no intention of putting it out of daily-driven status any time soon
You WILL have to work on it though. Periodically I have to clean the spark plugs (probably because it's not tuned properly), you'll have to keep up on the oil and grease points more than your TJ. It's not difficult to keep up though, at least from what I've seen. I had to clean the speedometer cable, adjust the brakes, and constantly top off the engine, and transmission/transfercase oils. The differentials are the only things that don't leak, haha!
It doesn't look like a rust bucket from the photos, is it in driving condition? make sure you're up on your tetanus shot
There's no such thing as a rust-free willys