My freekin' GAWUDWUDEAD!!!


Just get or make a POSITIVE STOP and FIND absolutely correct tdc:



Remove the ground cable for safety, determine that the piston is down a ways, and put the stop in no1

Gently wrench the engine around, until it stops, then make a temporary mark on the wheel right under the TDC mark on the timing tab.

Do the same CCW.

Now you'll have two temporary marks some distance apart. True TDC will be halfway between the two, and if any of the marks on the wheel are still accurate, that's where one of them will be.