This Top Street Performance Ready to run distributor has a machine polished aluminum housing with an adjustable vacuum advance along with a simple 2-Wire hook up and brass bushings.This unit features an improved high performance module for u se up to 7000 RPM and chromoly steel gear. Features:Fits Big Block Chrysler/Dodge/Mopar 413 426 440 V8 EnginesMaintenance free magnetic pickupBuilt-in ignition moduleIntegrated ModuleAdvanced vacuum tuned for optimal performance Requires an external coil {specs}