Do NOT get 3 ohm coils. For points and Dyna S in street applications use 5 ohm coils. 3 ohm coils draw way too much current on a street bike. Why TF do people sell them for street apps?
3 ohm coils tend to run much hotter and they run batteries flat and cause low speed misfires with older charging systems.
That's not to say that they can't be used, but they are not designed for points on a street bike.
Dyna S, or Pamco are good ignitions. Dyna will need some work to make it fit. Pamco I believe now offer a CB350 kit. So do Bore Tech now I think about it.