timing light??

Dialbacks are fun to play with but a good name brand accurate regular type will suffice. Find true TDC and only need several addit'l white paint marks 10, 15 17.5 20 and your total 35 or 36 works well. measure/cut a strip of paper with your calipers & mark it & use it to measure your new marks around the dampener. 0.0632683" is (1) degree IE 2 &1/4" (2.246") is 35.5 deg. Way back one of the ign companies did a study of lights & found the sears std light was pretty accurate. dont remember the #, 1234 ?? been a long time but I think it was a 4 digit #