Advance spring

Thanks 340six glad you're happy. The new aftermarket distributors usually have a really fast curve in them set up more for the track then the street. Some engines they work great others they ping badly. kind of like buying a Cardone from RA. Now on vac advances I have seen them marked as low as 6 and as high as 14 degrees distributor that is double at the crank. That is the most it will advance. Most are adjustable if they have the "hex" can adjust the rate as needed. Just fyi use a digital advance light oor a timing tape to clock it. The old analouge dial backs are usually way off due to age and wear on the potentiometer. I really like those blue dot springs for stock applicationns they seem to wake up almost any engine. hard to find now. I got lucky and fell into alot of them but they are all gone from me now.