This is from the Jim Carter catalog for item EL158
"This item is a traditional round 12 volt coil but has a built in reducer. Eliminates the need for outside reducer EL181 when changing to a 12 volt system, includes mounting bracket....Can be used on 6 cylinder engines from 1937 - mid 1955 when the 6 volt system is changed to a 12 volt. (Remember the ignition points in even a 12 volt system will only operate on 6 volts, through the 1970's)...Sold each...Made in USA".
This is the coil I have been running on the 54' 235 in my 50' (12-volt converted) for the last four years. No external resistor, no burned points or other issues.
