from what i can gather it looks like he's asking if it would be possible to fit a new acura TL engine into a newer model civic SI.

would be an interesting swap to do if possible but i personally don't think it would be worth the expense or all that work when you could probably even do a turbo b series for less considering how expensive and hard it would be to get a TL engine.

btw, this is just my 2 cents from what i could understant in his post, i might have misread it though, so i could be completely wrong