Can you tell me what the correct diameter or circumference is for the '69 YT 400 harmonic damper? My measurement came out to 21.5" circumference, which should be 6.84" diameter, which seems an odd size. If correct, 30 degree timing mark should be about 1 13/16" from zero mark?
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching