Okay, first off, I've wheeled with Knoll. He's been willing to do anything just about anyone else has, and the only time I've actually seen him fail was also the time the every other Toyota (including a mini truck, an uber built 60, and my 80) got smacked down by a little Sammy with huge tires. ;p
There's a couple of interesting points in the discussion, but I think a lots gotten lost in the....uh...."debate". Yeah, lets call it that. ;p
As many have said, it's largely apples to oranges. Some people have pointed out the price for a build-up, but that's not really a fair comparison. While the FJC
will be more expensive to build up (especially if you go serious and swap to a solid front), mild to medium builds aren't all
that much more.
So compare a brand new FJC build to a brand new 80/LX450 build. Anyone wanna guess how much of a head start the FJC could get on a build with 20k-30k?
Sure....
now 80's are $5k-$10k unbuilt, but they're also 12-18 years old. In 12-18 years I have no doubt that FJC's will be similarly priced....if not cheaper (simply based on the starting price). Even estimating what an FJC would be in 15 years (at a much lower price), I doubt that the total build price would be a heck of a lot different than an 80 is now. IMHO the extra cost of certain things (like dealing with IFS for lift) would about even out the cost of the naturally higher price of an 80 due to the high new price.
So....price:
New: Nod goes to the FJC
Used: About even
Reliability:
This one's pretty simple for me. Yeah, most of the weak points on the FJC are the same as the 80 (skid plate, rockers, bumpers, lower rear control arms, etc). But the FJC still has that pesky IFS which simply adds a lot more complexity to it, if in no other way that simply protecting it. Overall what I know about the FJC has surprised me about how tough a beast it is, I think that a lot of people here are underestimating it's reliability and toughness, even in extreme and rough conditions.
But still, the IFS adds a lot more complexity, and thus a lot more room for breakage. So I'd give the nod to the 80.
Performance:
This is the toughest one because absolutely no two people will 100% agree. Toughness/reliability aside, there's no real fair way to compare an indie front end to a solid axle. There are places where each will excel. Now obviously the extra clearance that IFS gives you is nice....
I've seen nearly stock 80's walk over obstacles that FJC's hang up on like crazy. I've seen built 80's hang up on obstacles that stock FJC's don't even notice. It really is comparing apples to oranges, especially when you try and compare things like "triple locked" to "ATRAC and rear locker" (and I don't think anyone's mentioned yet that the FJC can actually do
both ATRAC and the rear locker at the same time, which in quite a few circumstances is actually better then a locked/open front).
Each has the pluses and minuses, and I think you'd be foolish to drive one the same as you drove the other.
That doesn't even begin to include things such as the relative compactness of the FJC compared to the frackin' huge 80, clearance in relative areas.....etc etc etc etc
So, for performance, I'm gonna wuss out and give 'em both a nod.
For those of you quick to knock the FJC, I'd have to say go buy one and use (and abuse!) it yourself.
Knoll wheels the

out of his FJC, and has gotten something of a rep in our club as the guy who will do anything (sorry, but it's true!). His FJC I would only really consider a bit more than mildly built, and for how (relative) little he's put into it it's quite an amazing rig.
Me personally, I chose an 80 because I knew I could pick up an super clean one for around $10 (actually paid $9), and build it up pretty decent for just a couple of grand, though a lot of that has been sweat equity.
If money wasn't an issue and I wanted a simple turn key solution, I probably would have gone with the FJC. Knoll's truck hasn't let him down--
ever--and anywhere he's been stuck any other truck could have easily gotten stuck as well. I do think that he's paid too much for it, but I would think that of
any new truck, and I'm actually quite surprised at how (relatively) little money he has into it for being "new". There are certainly quite a few 80's that aren't really much more built that his truck for as much or even more.
Yeah, the FJC could use some improvements (hey, Knoll, when we gonna do that ATRAC/Rear locker mod?), but don't knock it 'till you're tried it.
