[cobrashoch]

Freddy - Roughly speaking when the power curves and the torque curves are identical on a engine, they will run exactly the same, (straight line) assuming they have identical bob weights and the same rods. Makes no difference the size block you use, or if it's a Ford or a Chevy or whatever. Of course I am speaking in a broad sense, and that's exactly why I am big on supercharging. It's the best and cheapest way to add cubic inches without changing the bottom end dynamics of a engine radically. That is very important on lightweight cars like Cobras especially.
There is something to the revibility issues mentioned above on engines, but it has more to do with drivetrain geometries and blue printing mechanics than the size of the block. In a broad sense they run the same, unless you change to a turbine or change the fuel you use, or do something else radically different.
cobrashock