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Ya, these motors are fine with boost if kept at or below 7ish lbs. I'll let the cat out of the bag a bit early, but I'm building a single rear mount turbo kit for my truck using a turbonetics T4 and tuning with a unichip. There's a bunch of tundra guys that have done it and been fine for years and years. Mine isn't going to be intercooled, and should be just fine.
Are you able to stay within the limits of the stock fuel system, or can the Unichip handle larger injectors?
Yea, the unichip can run a 9th and 10th injector if needed. I'm going to attempt to use the stock injectors at first and see what the wideband says. I only plan on 5 or 6psi; so we'll see.
That's what I'm hoping for. I'm sure the truck will have some sort of driveablility issues, which is why I'm going unichip. I'm planning for the worst and hoping for the best. I have a feeling it's going to run rich under part throttle, that seems to be the consensus with the tundra guys,
I followed a build on the tundra forums and the guy had a 9th injector installed when he did his turbo, and he didn't even need it. I know every truck is going to be different, so I'll cross the bridge when I get there. At 5-6psi I'm hoping the factory injectors will keep up.
Yes, and simple is better than complicated. If it needs it, it'll get it. If it doesn't, it won't. I don't drive the truck often, it's not a DD, so I'm not in a hurry to get it done. There's a lot of things it "may" need, but until I know for sure, It's all hear-say.
Lexy does not seam to notice really, we always keep the 20 gallon water tank full where the spare tire used to be and the 5 gallon jerry on back full of fuel. We have HD ARB rear springs and good tires. Our ICON suspension is valved for our weight, we have the I OMEGA by pass all the way around. I installed the ICON pneumatic rear bump stops in rear coils. We also have Nitro gears =4:46 with ARB Air Lockers, I know thats a lot of stuff added but Lexy will motor over 15" rollers at 60 MPH and not get upset. At this point we need a roll cage because she always wants to go faster and bigger, of course we don't always drive like that. 
The brakes are very strong even with our weight, power is great with the new gears. No complaints really. Tuff little Prado 120
Sorry I just found this post, yea we are very heavy, I don't want to say in print what we weigh
Seth
I get that as a fairly stock GX around town with 285's, lol. Kind of reminds me of the old big block Chevy trucks. They get about 8mpg unloaded and 8mpg pulling 10,000lbs.
