[Kevin in NJ]

Really you want a nice reliable stock ignition.

Electronic ignitions arevoltage sensitive where you can crank or push start on a marginal battery you are stuck with electronic. It does not buy you enough advantage over stock unless you are going radical high compression.

You really need to establish what was done to your engine before contemplating changes. So many arebuilt out of balance.

You should also keep in mind the A was built to very tight specs. When working with parts of it you well need a good quality micrometer if you want to do it right. Also bear in mind many threads are done to a tighter tolerance and you must not use standard tap and dies on them.