Ballast resistors are not required for the DUI as this system works best with full alternator voltage.
An adjustment free vacuum advance canister is selected to work with the centrifugal advance for better drivability and increased fuel mileage.
The mechanical advance is then tuned using a Sun distributor machine to ensure a precise timing curve that will provide maximum power throughout the RPM range while eliminating engine damaging detonation. We use a high performance weight and spring assembly engineered for super smooth operation. The DUI centrifugal advance system is a true Performance Distributors specialty. 055″! Our high dwell Dyna-Module, located inside the distributor, increases spark duration for improvements in throttle response and low end power. The DUI is equipped with an internal 50,000 volt coil, which will fire a spark plug gap as large as. The all-in-one DUI replaces the weak three component system that came standard on the AMC engines and utilizes only one 12 volt hot wire for hookup. This is due to the simple one piece design, easy installation and performance enhancements over a stock ignition system. Our DUI Distributor is one of the best selling ignition systems we offer. Fits: 66-71 CJ-5, CJ-6, and Jeepster Commando with 225 Dauntless Odd Fire. If you want the correct HEI this is the only option. We do not recommend using the shorter version. Part Number 63720-EXT has an extended shaft to allow the distributor to clear the intake and head on 66-71 Dauntless 225 CI Odd Fire engines.