Title says it all. This will serve as a place to ask questions if you are interested in or stuck on completing a 3.4 swap. A lot of folks have done the leg work to document the process. Rather than reinvent the wheel I'll start off by linking to the threads I found most useful.
Start here...
1989 4Runner v6 5spd
My first car was a 2nd Gen 4Runner. After seeing first hand the abuse they could take I became a Toyota fan for life. I eventually sold it and got a commuter that was more practical at the time. When I decided to pick up another 4x4 to get places my daily driver couldn't...