The 3.4 is a pretty strong runner, you can build a 3.1 to give a good turn of speed too. See the other recent 3.1 thread here for more info.
If you'd like the files I've accumulated on the 3.4 swap (and other Good Stuff on the 60 deg V6), send me a P.M. with your e-mail address, and I'll forward the info to you............ed