MSD 8005 Iron Distributor Gear for AMC V8

The MSD 8005 is a precision-engineered iron distributor gear designed specifically for AMC V8 engines. A distributor's performance is only as good as its drive gear, and MSD has invested heavily in researching and testing metallurgical compositions, heat treating processes, and protective coatings to deliver a gear built for durability, accuracy, and long service life.

MSD engineers developed dedicated gear test fixtures capable of variable RPM and oil pressure control, allowing evaluation under real-world and extreme operating conditions — including loads up to 10,000 RPM. The result is a proprietary iron alloy gear with a low-friction coating process that delivers reliable ignition timing throughout the RPM range.

Key Features:

• Proprietary formulated ductile iron — high-grade alloy construction for strength and durability
• Micro-polished surface — smooth contact finish reduces scuffing and wear during initial break-in
• Increased outer hardened layer thickness (RC 55–60) — greater case depth for extended service life under high loads
• Melonite QPQ coating — reduces friction and minimizes wear during the critical initial break-in period
• Interstitial carbide concentration — improves wear resistance and long-term running properties
• Includes new roll pin — everything needed for a complete installation

Installation Note: This gear is drilled on one side only. After mounting the gear on the distributor shaft, align the holes and finish drilling with a 3/16" drill bit before installing the included roll pin. Thoroughly clean all metal shavings before installing the distributor. When installing a new distributor gear on an AMC V8, it is strongly recommended to also replace the camshaft-mounted distributor drive gear to ensure a properly matched set and prevent premature gear wear.