71 LA 340 timings moved!! how?? looking for help

Well that whole design was just trouble as it got older and wore out.I've seen Mopar Ds still running with a quarter million miles, and the parts still working just fine. Well sometimes seized, so not quite fine. But a couple of minutes and back in action. I like their's being on top tho.
470,000 on my power wagon distributor, changed engines a couple times, but dist is the original methinks.