Well a buddy of mine is going to get some long tubes but on his 92 5.0 and i figured i would check in to getting some. I am thinking about MAC long tubes with a Mac prochamber. How much am i looking to get this stuff installed? Also what kinda bolts woudl you use. Besides mil elims and header gaskets and studs what else would i need to pick up? I hear this takes about 12 to 13 hours on a 99 cobra from what a few peopel have told me on other boards.