the engine in the car is quite easy to get the power out of, and not as expencive as u would think, the 5.4 and 4.6 modular ford engine is so tunable, and unlike over here were cosworth bits cost an arm and a leg, the tunning parts aren't to dear.
the ford GT dry sump block is (alloy with dry sump setup) $2500
rotating assembly from MMR rated at 2500hp $4000
i bourght a pair of complete genuine ford GT heads for the engine i'm building for $2000
if u allow the same amount of money again maybe a little more for the rest of the bits i'm sure u could get an engine producing the power this GT is running, i'm allowing $15-20k for my engine, but i'm going supercharger not twin turbo, as said, i have the heads already, and also i have the ford GT inlet that take 16 injectors, the 16 injector GT inlet is only $300 delivered and is a work of art.
the inlet kit.
my $2000 heads