[Blair]

I may be an idiot but this is how I see it:

There is no replacement for displacement.

Therefore:

VE SS = 270kw / 6.0l = 45kw to the litre
HSV GTS = 307 / 6.0 = 51
LS7 = 373 / 7.0 = 53
GT DOHC = 290 / 5.4 = 53
XR8 = 260 / 5.4 = 48
4.6DOHC = 240 / 4.6 = 52

You are always going to get more power for less money the bigger the displacement.

Last time I looked brand new DOHC eninges were the same price as a LS1/2.

The moral of the story is simple; if you want more power and bigger cubes go the Chev. If you are die hard Ford fan or like the DOHC setup (like me) adn want to mess with people who have bigger cubes just add boost. Supercharger kits are only 4 grand now!