I say it is a lot of work for not much gain. Why not a 5vze, or a 3RZ? If they are just not available where you are then I guess it may be worth it. Why not take the time and money to rebuild your 3.0? Beleive it or not, as slow as they are, they are still faster than a 22re. Plus there are a ton of them available for parts. At least here in California. I know the 22re is more reliable, and easier to work on. But I think you would find that if you took the time to completely go through your 3.0. Use quality parts. You could be happy with the 3.0 in the end. My brother has a 3.0 with 210K on it. I did the heads about 10 years ago, had DOA machine them, and it runs great to this day. It would take my 22re any day. Now I have a 3.4l that will blow it away though.