Its not worth the effort, you will spend more money putting a 4AFE into your KE70 than you will putting a 4AGE in it. There is a reason no one has done it...
You may as well go 20v 4AGE if you're going to go to that much effort.
Edit: If you don't have much money you should consider a 5K swap, they go reasonably well and the engine conversion couldn't be easier.
And to answer your 4AFE RWD related questions: I'm going to go with no, but only because I'm not sure what you're actually asking. And I don't mean to be rube but try to employ these guys, they might be able to help us help you: