Custom distributor curving.

Nice work. That's the chart from mopar enthusiast magazine. Ted Wagner wrote a couple very good articles on how to do that. Think it was in the first two issues.

The two light springs will bring total in between 1000 and 1200 rpm. My personal experience is that on the street they seen to run better with total coming in at about 2200 rpm Wich you get by using the stock light spring and one real light spring like you used. Curving your dist is one of those real easy things that for some reason people are scared to death to try. A properly curved dist makes a huge difference.