There's plenty to do. One other Toyota-based swap that may be worth entertaining would be to go from the 3.0-liter to a 2.7-liter four-cylinder (3RZ), also from later 4Runners and Tacomas.

Toyota really got it right when ... involved the removal of the original 3.0 V-6 and setting the 3.4 V-6 in its place. This swap is fairly straightforward; the transmission and the motor mounts ...

Toyota's baby RWD coupe ... Some people get a GR86 as a base for an engine swap, and Jeff is the first to install a 2JZ in a street-going example. The owner of this example dreamed up a build ...