That looks great! No direct electrical connection between primary & secondary. Should read infinite. Get a magnifying glass & look for little bumps on the exterior of the coil. If it was turned over while the plug wires were off, it has now created energy & needs to go somewhere & sometimes arc to ground thru the coil close to the mag plate making small openings on the exterior of the coil. If replacing the plug wires clean your soldering tip well while hot then melt or tin fresh solder to the tip. Reason why is liquid solder transfers heat faster so the original solder joint melts faster & can get the heat off the coil terminal faster giving you better chances of no damage to the coil or terminal. Just like boiling potatoes in H2O, heat transfer is all. P.S. use a wet sponge while prepping the tip.
