anyone know how to set timing on a 1997 454 mpfi engine without a scan tool? If not, what sort of scan tool is required? I replaced upper and lower intake gaskets and had to remove distributor, but it was loose and moved before I could mark the location it was set, I have rotor set in at the correct factory location, including oil pump, per ALLDATADIY and my Haynes manual and it will start, but it gives a random misfire code with barely any acceleration or power when I try to drive it and has a bit of a stumble at idle, like it's missing a cylinder. I've searched the forums but I get random responses from the search engine so I'm hoping someone can just give me a straight answer!! Thanks!!!!!