Now that you no longer sell it ill throw in my 2 cent's. Making more power by putting in a weaker cast crank seams like a bad idea.
I think it will have its pros and cons.
Engine will have way more torque produced, due to the addition of .4 liters/displacement.
But will rev lower compared to a 2 liter.
The lower rpm at WOT/high hp........might not really stress out the weaker crank as well as the valve springs/etc.