electronic ignition in an early A

If a V-8 (please always tell us when asking an engine question), the "Ready-to-Run" Chinese distributor ($45) plus e-core coil ($25) (both ebay) is easy and inexpensive. Many posts. For a slant, Pertronix installs inside your points distributor - get II or III since better. Can also get a later Mopar e-distributor to drive an 8-pin GM HEI module & coil (85-95 V-8's, any junkyard). Many posts on all w/ photos. One guy makes an alum plate that bolts under a slant distributor to mount a GM 4-pin module. The Megasquirt site describes many options.

All above eliminate your ballast. Some early systems (original Ignitor, Crane Cams XR700) require the ballast, as does the 70's Mopar ECU.