It’s been awhile since this was posted, but I used a wooden dowel to find TDC on mine. Glad I did, because the timing mark on the dampener was off by about 6 degrees. The plug location makes it easy to determine TDC...turn the engine by hand till the dowel stops rising on #1, and mark the position on the damper with chalk. Turn backwards, and do the same, and mark. TDC will be between the two chalk marks...mark that spot with paint.