I've been running the tundra conversion for 100k miles. Handling is improved, no downsides I've seen. It does make the tires stick out if you run lower offset wheels.
follow the original thread for parts list and install tips.
the frames are probably the same width, i've swapped the front differential from a 2010 sequoia into my cruiser to change the gear ratio down to 4.30. dropped right in.