Don't think BigMike has a write up or build thread here, but for the others either check out the build thread sections. BigMike's is on Marlincrawler's forum.

 

http://www.toyonlyswaps.com/Page_3.html

 

lot of pics but not easy to navigate, or at least not on mobile

 

Look into turbocharging what you have (rebuilt, of course). For the price of a swap and all the figuring-out, it might be an option. Plus, home-brewed, non-factory turbo engines are bad-ass and give you credentials forever.

 

3.4 is costly but sooo worth it.

be kind to yourself and your wallet and get a donor vehicle like stated above.
i really enjoy mine, but if you don't need the torque to pull with you would probably be fine with a 2.7. you can supercharge either one, or turbo the 4 banger.
find used taco's at a used car lot and test drive both engines to decide for yourself which engine you prefer.