Using two stock light springs in distributor advance, good idea?

Just fyi the studs the springs go to are eccentric and you can tighten and also loosen them and you can possibly get more out of it if you just need a bit.
That’s good to know, do you care to show us a pic of that if you have a unit handy? I know I’ll be re-curving when I make the change to deeper gears, and may need the extra adjustment