ive got a 2003 4.7l boat anchor and it needs some pep in its step. im wondering will the heads and intake from the 2008+ 4.7 fit on my 2003? from what ive read its the same block so it should fit but before i invest i want to be sure its compatible. and also where is a good place to get these? i also understand the 08+ 4.7ls have more dome top shaped pistons. my worry is that if the heads are cut out to accept these to create more compression it may cause my engine to have less compression than it does now with the flat tops. one more thing i want a programmer as well. im thinking SCT from hemifever. superchips would be ok too but with the sct it would still work after the engine work. i imagine if you changed much on the engine the superchips wouldnt work right. oh and before someone comes on and says HEMI!!!! ive already tried that and my wife said i cant have a new truck lol.