Well, I live a hundered miles or so from some of the swampiest swamps. And I have heard of at least one person putting a Toyota engine in their boat, but it wasn't a 1UZ.
Anyway, regarding the swap:
There are several in the works right now...
some manual, some auto.
I suspect we'll see some dyno plots and time slips by spring :]
Regards,
Jimi B