Replacement coil on a 1980 KZ750G

Hello.
  I’m having an issue that I believe is weak spark related. (Fouled plugs) I plan on installing the Wired George mode to improve spark, but I want to replace the coil after seeing what my original oil looks like. 
Thinking of running this one or similar.  Will this work? I’ve attached the screenshot of the replacement coil and specs.
   I’ll take any suggestions for what you used and experienced.   
  My problem may not be ignition related issue, but better spark won’t hurt.
Thanks in advance for your help.  

Edited to add that the fouling happens after an extended drive over 45-50mph on backroads. Around town the plugs don’t foul out. 

Check manufacturer spec for primary resistance (I think 2.4 ohms is too low for your bike) as if the resistance is too low the current draw will be excessive

Yep. You’re right. The manual says primary should be between 3.2 - 4.8 ohms. I’ll keep looking for a coil replacement.  
   The specs at the front of the manual says the plugs to use are B6ES, but back in the maintenance section it shows B8ES is best for normal riding.   Maybe the 6’s aren’t burning off the carbon at higher sustained engine speeds?  I have new plugs coming b6es, b7es, and b8es so I can test the different heat ranges. 

Sounds abit counter intuitive but 6's are hotter, 8's are cooler.
The heat ranges are achieved by the amount of insulation within the plug core. The more the insulation the less the transfer of the heat to the head. So 8's have less insulation than 6's so they run cooler as more heat is transfered to the head. Plugs need to be in the correct heat range to enable them to "self clean". 
 

Yep. It’s something like that. 

Maybe I’ll try some B5ES plugs. 

Z1E sells a 4 Ohm and a 4.5 Ohm dual outlet coil.