1993 22RE, been driving around 80 miles about 55-60 mph and the truck just died. Head was replaced about 300 miles ago, ran good, but had lots of what sounded like valve chatter. When it quit I coasted and parked, tried to turn it over and it sounded like a timing belt missing would sound, there was no abnormal noise at all when it stopped, also there was no spark. Any guesses on what it could have been? I got it all fixed, and know exactly what the cause was, I want to see if anyone can guess.