There is no instruction sheet that I know of so far.What type of curve do you need? These units run pretty good with the springs already installed and most of the time you only need to adjust is total mechanical advance with Phillips screwdriver. If you have ever changed the springs on a Mopar distributor you can work on this one.
Gus

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64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60