360 timing issues

60Powerwagon said
It’s only running from 5-10 degrees after TDC. It should be 10-15 before. Anything more or less than that it will die. Idles fine and best at about 8, but anything over 1/4 throttle it clatters bad

ok, you didn't say you tried to advance it too. At this point it could be fuel delivery, or something in a clue we haven't got yet.