I found one post on ClubLexus about fitting a 2005+ 2UZ manifold on a 3UZ, which means it'll fit a 1998+ 1UZ. There are other posts that say this topic has been covered here, but I can't get search to work. Has anyone done it? How bad is the job? The CL member said he definitely felt some gains, but he had to modify the injectors, fuel rail and throttle body. If anyone has insight on this swap, it would be greatly appreciated. Thanks.