180 rally 12 v convertion

I have a Uk version battery and key ignition 6v rally 180. I was thinking to convert to 12 v non battery system with electronic ignition.  The 12 v will not sit in the place for the 6v battery so I think the best is to avoid having  a battery if poss. I clearly need some rewiring new light switch ontop the new electronic ignition. Any advice. is it worth it? I keep getting coils breaking on me on original system.

 Why is that any help or advice please? Obrigado Trevor