I have a 1985 F150 4x4 inline 6 manual. The speedometer reads 680k miles but the engine bay was rebuilt at 500k, she was working flawlessly when it was passed down to me a few months ago. Unfortunately, one day i was using the truck and it all just suddenly stopped. It cranked but never started. I tested a few things like figuring out spark but unfortunately I haven't found anything to work. I've replaced the distributor, Coil, ignition switch, and the positive and negative hook ups from the battery. Still nothing, I'm just a young kid trying to keep his pops truck alive and not let it go. If there's something else I could be missing it'd be appreciated. I just don't know what else to do but keep reading the dang book about the truck.