Basic “how-to” timing

I have two "vintage" Craftsman timing lights that don't work. They worked great when new but the capacitors for the high voltage power supply used to fire the flash tube go bad when old. The new timing lights just use LEDs so they are much simpler (and cheaper) to make.
 
Ok, update! I ran my vintage Craftsman test light with great success! Timing was initially at 0 degrees and was running rough and missing. Once I rotated the distributor and set the timing to 10 degrees she was smooth. Took her for a test run and she ran the best she ever has! 😁
Thanks for everyone’s help! Success!!!
 
I picked up a used Craftsman light off eBay as I’m a whore for Craftsman tools especially “vintage” ones. I’ll see if it has any dials but it may not…
Had this for 40 years.
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