That was actually my first source of confusion in this thread: the crank wouldn't fit without serious modifications. Hell, the 2.4L block is a bit longer (er, wider for all of you who think in the transverse state of mind), so the crank would be wider. I wouldn't want to try t omake it fit. I wouldn't worry too much about dwell time at TDC and BDC, especially when an extra half litre of displacement can be attained no revlimit penalty (we can't go over redline, anyways, so a motor that revs beyond that is wasted).
-=B-=