IMHO, its super easy on a T100 because there is lots of room. More work on a 4runner/tacoma because of the tight quarters, but still not all that bad.
I've done 4-5 3.4L belts. The 3.0 looks pretty similar.


'97 4Runner, '06 F350, '86 4Runner, '05 WR450
http://home.4x4wire.com/erik