Davis Unified Ignition (D.U.I.) GM Carbureted LS Engine Distributors are now available for the 'hands-on' type that do not want an LS engine to be controlled by a computer. Whether building an LS engine for street or race use, these distributors will allow you to eliminate the 8 coil packs associated with the LS ignition system, and replace them with an all-in-one distributor. This can be a huge advantage to diagnosing faulty coil pack hassle and/or computer tuning issues. D.U.I.'s distributors have a very specific advance curve specifically for the LS-carbureted engine, delivering throttle response and performance throughout the entire RPM curve.