Boring won't increase displacement by much. However stroking will and it plays a bigger factor in overall engine displacement.


Look for posts by me with a bunch of math in the posts below:


http://www.toyotanation.com/forum/showthread.php?t=87406&page=2

http://www.toyotanation.com/forum/t45181.html



I basicly prove that stroking increases engine displacement a lot more vs. boring.

As for your question about the crank. I don't know if one exists or not, or if you can use the crank from a 3MZ-FE.

 

i belive the 3mz uses a diffrent crank and only the 2mz and 1mz share the same crank (judging from bore size)

you can always get the crank redone to give about .1 more