Ford 351W HEI Electronic Distributor - Blue Cap

The Ford 351W HEI Electronic Distributor with Blue Cap (PROFORM model 66983B) is a direct-bolt upgrade designed for carbureted and early EFI 351W applications requiring reliable spark distribution and electronic timing control. Built for enthusiasts restoring or modifying classic Fords, this distributor eliminates the limitations of aging mechanical distributors while maintaining OEM mounting compatibility. Whether you're rebuilding a muscle car engine or upgrading an existing platform, this distributor delivers consistent ignition timing across the RPM range.

The HEI (High Energy Ignition) electronic design integrates the coil directly into the distributor cap assembly, increasing spark energy and firing voltage compared to traditional points-and-condenser systems. Electronic triggering eliminates point wear and dwell angle inconsistencies, ensuring precise spark timing regardless of engine load or throttle position. The blue cap finish provides both aesthetic appeal and UV-resistant durability under the hood, while the sealed housing protects internal components from moisture and contaminants. This configuration supports higher RPM stability and improved cold-start performance, critical for street and strip applications.

Mechanics and engine builders frequently specify HEI distributors for 351W Windsor conversions in Fox-body Mustangs, vintage Broncos, and custom hot rods where ignition reliability is non-negotiable. Installation requires a compatible HEI-capable ignition module and wiring harness; verify your vehicle's electrical system supports 12-volt negative ground operation before purchase. The distributor's compact footprint (8.2 x 6.9 x 17 inches) fits standard 351W engine bays without clearance issues. This upgrade is ideal for carb-to-EFI conversions, performance tuning, or simply replacing a worn original distributor with modern electronic dependability. Proper gap setting and initial timing adjustment are required during installation.