If you can't find a degree tape and don't want to make index marks on your dampner, here's another quicky & dirty way (don't laugh) to find TDC for each cylinder:
- Drill the spark plug wire connectors out of an old dist.cap and place the cap on the distributor.
- Rotate the engine to #1 cylinder TDC. You will see the rotor tip in the hole, note it's exact position relative to the hole.
- Adjust #1 valves
- Rotate the engine until the rotor tip is visible in the same position at the next hole (#5 unless you have a 351W firing order cam) and adjust those valves.
- Repeat until done.
If using points you can also obviously pull the dist. cap and watch how the points line up relative to #1 TDC and repeat for all cylinders. The drilled cap is a little easier IMO and can be used if not running points. May sound goofy but if done carefully should be just as accurate as the other methods.