RoadRunner Dual point Distributor
I would NOT screw around with points. Dual points are cast iron "Prestolite" and much more common for RB (413/426/440)
I would do one of the following: (no particular order)
1....Buy a factory electronic, and recurve it. There's an outfit makes "easy" recurve plates called a "limiter plate"
Distributor Limiter Plates
search "FBO Ignition"
...............You can use that to trigger a Mopar factory ECU, an GM HEI module, or some other ignition such as an MSD box
2.........Buy a Pertronix. Lots of guys use them, they seem to be reliable. Downside is, if it quits you won't find parts at some parts store. You better buy 2 kits to have spare parts
3......Several aftermarket distributors and ignition systems, more expensive