Cruiserdrew
On the way there
If you mostly want an off-roader, the motor as long as it runs at all, doesn't matter. A Briggs and Stratton lawn mower engine is practically enough.
And you already have a V8! Yeah. Plenty of motivation for any FJ40. Just get it running and cooling well.
I would put the 3 speed out to pasture in time.
If you plan a lot of off road, an SM420 swap makes a ton of sense. The adapter to your existing 3 speed case is still out there, and in my 15 year experience is bullet proof. The gear spreads are wide for a street truck, but the V8 will make up for that short coming.
But if you don't, I'd recommend a stock 4 speed Land Cruiser transmission. That way it's synchronized in all forward speeds and the gear spreads are just right for mostly street. A deep overdrive like NV4500 isn't really needed and that's a spendy transmission. It's also kind of long in a 40. And lastly, FJ40s really are not that safe to drive fast. With stock everything you can go 65 which is more than enough for an FJ40. So deep overdrives, more power etc, just isn't a thing you need.
Your 4.11 gearing is fine with that V8 for anything up to 35 inch tires.
It sounds like a whole lot of wants you don't need to me. What I would want in your position:
Front disc brakes (swap in a later FJ40 axle or just the outer parts from FJ60)
2.5 inch suspension lift
Power steering conversion
All systems working well
$$ for gas
Then go the places you want to go. If you find a place you can't go, then, modify based on what you want.
But do one project at a time. Finish that project. Then plan/execute the next. Otherwise you will loose focus and then motivation. For myself with my trucks-only one out of service at a time. No matter what. The same applies here. Get it working well as is, then 1 project at a time done to completion. Focus on getting it running AS IS. Then focus on excellent brakes. Then focus on excellent steering. Then and only then are you ready for anything else.
And you already have a V8! Yeah. Plenty of motivation for any FJ40. Just get it running and cooling well.
I would put the 3 speed out to pasture in time.
If you plan a lot of off road, an SM420 swap makes a ton of sense. The adapter to your existing 3 speed case is still out there, and in my 15 year experience is bullet proof. The gear spreads are wide for a street truck, but the V8 will make up for that short coming.
But if you don't, I'd recommend a stock 4 speed Land Cruiser transmission. That way it's synchronized in all forward speeds and the gear spreads are just right for mostly street. A deep overdrive like NV4500 isn't really needed and that's a spendy transmission. It's also kind of long in a 40. And lastly, FJ40s really are not that safe to drive fast. With stock everything you can go 65 which is more than enough for an FJ40. So deep overdrives, more power etc, just isn't a thing you need.
Your 4.11 gearing is fine with that V8 for anything up to 35 inch tires.
It sounds like a whole lot of wants you don't need to me. What I would want in your position:
Front disc brakes (swap in a later FJ40 axle or just the outer parts from FJ60)
2.5 inch suspension lift
Power steering conversion
All systems working well
$$ for gas
Then go the places you want to go. If you find a place you can't go, then, modify based on what you want.
But do one project at a time. Finish that project. Then plan/execute the next. Otherwise you will loose focus and then motivation. For myself with my trucks-only one out of service at a time. No matter what. The same applies here. Get it working well as is, then 1 project at a time done to completion. Focus on getting it running AS IS. Then focus on excellent brakes. Then focus on excellent steering. Then and only then are you ready for anything else.