yeah I JUST had this problem with my motor. Even though mine is a single cam but yeah check your timing, make sure that is it correct and exact, and then before you turn it over change the plugs. Since they are drenched in fuel youre not gonna be able to fire it up unless you have dry plugs in. Make sure your battery is charged also and if its not in the slightest way then have someone jump it while you try to start it cuz the more you try to turn it over the more fuel youre gonna get onto the plugs. If there is nothing else wrong you should be able to start it. If not then there are prolly other problems.