There is more involved than you think.

The engines are completely different. The easiest way would be to have a complete 4.7 donor truck. You will need all the computers and emission hardware from the 4.7 to change out the 3.4L.

I honestly think you would be cheaper to find a 4.7 truck and buy it. The time alone in the engine swap would be an ass kicker as well.

There are a lot more 4.7 trucks out there than the 3.4.

On another note. The 3.4 motor has great value as a running motor. The 1st gen Tacoma crowds are always looking for this motor (I'm a member of that crowd, but don't need an engine...yet).

 

There is more involved than you think.

The engines are completely different. The easiest way would be to have a complete 4.7 donor truck. You will need all the computers and emission hardware from the 4.7 to change out the 3.4L.

This is probably the best answer anyone could give. You're going to need things like exhaust, airbox, wire harness, rubber fuel lines, the list goes on and on. I did a 4 to 6 cylinder conversion on my '98 Tacoma but I had a donor, a torch, a welder, and the skill set needed.

 

I agree with Koditten, heck of a job. There would be a good chance that the job would become so involved that you just might end up with a disassembled truck in your driveway for a few years.

Enjoy it for what it is & keep things simple.

 

lol, maybe cheaper/easier to fix the donor truck and make it work?