i don't see the 5.0 going anywhere for a awhile. but the newer redesigned 4.6 sound not too bad. they have displaced the engine to 5 liters, they did it in a pretty neat way, because you can't bore out the 4.6. Its a 4.6-liter 4V all-aluminum block whose displacement has been increased to 5.0 liters by the use of new "spray bore" technology. On engines like the 4.6 that cannot be bored out because of the limited casting thickness of the cylinder walls, displacement is increased by removing the steel cylinder sleeves from the cast aluminum block and spraying the bores with a ceramic-like coating that serves as hardened cylinder walls. apparently that is what the new 4.6's are going to be like to replace the 1st generation of 4.6's. at least thats what i've been reading
