I saw an old sales advertisement for the Victa range in the early 80s when their SuperStart electronic ignition models had been recently introduced and they were also selling points ignition versions of their side pull full crank (which surprised me). They charged a premium for models with the EI, so this means you have effectively upgraded your mower.
No more cleaning points and a more consistent spark.
The spark out of the Chinese block Powertorque with their integrated module delivers a very powerful spark.
Unfortunately there's no retrofitting those.

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!