I am going to start ordering parts to build my 5.4 soon and still have not decided to keep it 2v or get a set of 4v heads. Is there any clearance issues with the 4v heads? If there is no clearance issues with the 4v heads should i go with those or just stick with 2v and get a set of TFS heads? I plan on running a blower or turbo. and just out of curiousity, has anyone put the new 32v 5.0 in a 99-04 yet?