Distributor advance springs

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.
I’ll check as soon as I can. I had abother fuel pump failure so I’m gonna have to flush and change the oil before I do anything else cause it’s full of gas