Lots of room for something like this (see pic). with the original coils removed. The pictured coil is about $20. I don’t know how much juice these would draw. A small rechargeable lithium battery situated on the mag plate would be ideal in terms of looks – probably too much to ask. As for the plugs, I’ve got an inquiry pending at Brillman (https://brillman.com/). Lots of good stuff here and a 600 page catalog. Are these plugs likey to NOS (quite old)? If so more reason to use the adapter and a plug to match the coil. I’m also reading that on these non-electronic igntions a ballast resistor is necessary to lower voltage to 7 v. at the points (my MK75 has these resistors). I’m wondering if a 6v battery would make more sense.
