Karl missed something?
Are you sure about that statement?
There are some VERY clever people on here - I know Karl worked in R&D for more a very major manufacturer in the same way I have!
When we (When I was at Ford - Not Karl and I LOL) created the 2,2 diesel for the Jag X-type by bolting the 2.4 crank into the 2 liter block the power did not go up! It needed head redesigns and FIE changes to make the difference you feel and can see in the figures
Alex