Distributor advance springs

M
Mattax said
That is very load sensitive.
My suggestions are:
1 verify the #1 cylinder TDC and the timing mark on the harmonic balancer agree, if you didn't check it at the time.
2. Measure timing vs. rpm to the extent you can. With a timing tape and/or dial back timing light you can cover a greater range but even without those you (we) will have some information work to from.
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My timing light is one I got from a thrift store for $3 lol so it works but the manual says it’s circa like 1984 or something like that so it’s just a light. No additional features. Will it still work? I’ve marked the timing mark on the balancer with a paint marker to make it much more visible