Pre- 440 swap question

What year is the slant six car? It could have run without an ignition box if the distributor had points (1-wire, electronic distributors have 2 wires). That would be a strange combination to have the later electronic Vreg, but points, so likely one is not original.

You can find much info on here for wiring the orange box and dual ballast into a points car. However, that is fairly ambitious unless you are competent with wiring. The dual ballast was an early design for boxes w/ 5 active pins (most 5th pins today are a dummy). It would be easier to install a new HEI distributor ($60 on ebay for RB engines) and would give a slightly stronger spark. You can sell the other parts here or on ebay for about that to people already wired for them.