save your pennies, the 3.0 V6 that toyota used from '88-95 in their trucks isn't worth the effort. the 3.4l V6 that they put in tacomas and 4runners starting in '96 is a great motor though, but it would still be a lot of work to drop it into a truck that originally had a 4 boinger
my suggestion: look for an
I6 from an '82-90something supra and put that in. it'll bolt on to your stock engine mounts and 4 banger tranny, just takes some clearancing in the engine bay since it's a lot longer than the 4cyl. check this site out, this guy's done a lot of these swaps:
http://www.supracharged.com