A friend of mine just brought his 90 5.0L over. He is going to be going drag racing with me in 1 week. He wants to install a nitrous kit on his car i think he should shake the 2.73's first. I asked him if he has bumped his timing up and he says no. The car still is the factory ride hieght for heavens sake. But here is the rare find..................This car still has the factory air silencer in it. lol I told him how to remove it. I hope he does. man what a stock car that one is.