Short answer is no. No one has had any success swapping something else into a Dart. I asked in your intro post and got no answer, so I'll ask again. What specifically do you think is wrong that you think you need a rebuild or new engine?

 

I also asked and got no response....if you want to hear some B.S. story about how "Bob put a 2.4 out of his brother's NSRT in and it worked no problem" then you are on the wrong site!!!! Lots of informed users here would be more than happy to help out but not if you're to dismiss them out of hand!!

So, let's ask once more....what issues/symptoms/codes are you specifically having that makes you think your engine is failing????