I had a 79 D100 years ago, with a slant in it. I took off from home one day, got to the end of the block, made left turn, and BANG! Big backfire.
Coasted into a farm field entrance. I could see my backyard from where the truck came to a stop. I walked home, got another car, so I could carry some tools.
Upon checking it out, something led me to pull the distributor. (its been a long time ago, don't remember all details of the roadside troubleshooting I did.... )
But I discovered that the dist gear was stripped. I went to parts store, bought a gear, swapped them out, put dist back in, it fired 2 or 3 times, (never started) and then nothing. crank crank crank, no fire.
I pulled the dist (again) and the new gear was also shredded. This time when I pulled the distributor, the cam was in such a spot in rotation where I saw the issue... 2 or 3 sheared teeth on the cam gear. I have never seen that before, or since.
so I chain towed the truck home, found another /6, and swapped engines. I should have fixed the original. The replacement engine was a horrible oil burner. and worse on power, than the original ever was. To my knowledge, that original engine had never been torn into. It ran really good right up til it didn't.
After the bum /6 oil burner, that truck got 318'd. I never did pull that original /6 apart to see what else was damaged within, just scrapped it.
Im sure the oil pump gear was shot, as well. It had to be. I dunno "chicken or egg" progression of what went 1st, which then caused the carnage. It's been 30+ years ago.
