Australia-produced Bosch Electronic Ignition from the Bluebird Series 2 can be adapted to the A-series engine.
Overview
22100-V9610 U-PGFU 4 -> 349 520
Bosch distributor was used only on the 1983-1984 Series 2 Bluebird, in Australia
4-pin connector large cap cast metal ignitor box
To get the best from it, you will need to use the matching high energy type coil. That will really make those plugs throw a spark
DatRats did conversions to A-series when they were still operating.