my Low dollar 318 hop-up project

Two of Ma Mopars lighter factory springs usually slow that curve more than that. Is one of those the super light after market springs?
Yes, you are spot on. It was in a old dizzy that I found. It's trial and error. If I find a little heavier spring, I may take it back apart. However, the car really runs great, sounds great, starts great (hot or cold) and pulls very well (for what it is) as the car sits. The tweaking has just begin, and I won't leave it alone....... EVER! LOL. :D