The FireCore distributor does come with a spring kit.
From the factory it has 2 medium weight springs installed and approx. 20-22 of mechanical advance dialed in. Run it as-is and set the base timing at 15-16 @ idle and check the total timing. It will be all in by 3000 rpm and you should have ~36-37* total.
This works great with the majority of mild pump gas street builds
