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