MSD 8582 Pro-Billet Distributor Ford Small Block Iron Gear

The MSD 8582 Pro-Billet Distributor is a precision-engineered ignition distributor built for Small Block Ford 289/302 engines equipped with cast iron flat tappet camshafts. Featuring a cast iron drive gear and designed exclusively for use with an MSD 6, 7, 8, or 10 Series ignition control, this distributor delivers stable, high-performance spark timing from street driving through demanding race conditions.

The housing is CNC-machined from 6061-T6 billet aluminum to tolerances of +/- 1/1,000 inch, producing a rigid, lightweight structure that resists flex under high-RPM operation. The base is constructed from DuPont Rynite for added durability. A sealed upper ball bearing and long sintered bushing support the polished, QPQ-coated steel shaft, ensuring stable timing signals and consistent spark delivery well past 10,000 RPM.

The mechanical advance assembly is fine-blanked from chromoly steel, TIG-welded for strength, and QPQ coated to reduce friction. Precision advance weights ride on nylon bushings for smooth, consistent advancement. Multiple springs and stop bushings are included to allow custom advance curve tuning. The advance assembly can also be fully locked out for use with crank trigger systems. Triggering is handled by MSD's maintenance-free magnetic pickup paired with a precision reluctor for reliable ignition signals across the entire RPM range.

Key Features:

• CNC-machined 6061-T6 billet aluminum housing and DuPont Rynite base
• Cast iron drive gear — compatible with cast iron flat tappet camshafts
• Polished, QPQ-coated steel shaft guided by sealed ball bearing and sintered bushing
• Chromoly steel advance plate and weights, TIG-welded and QPQ coated for friction reduction
• Advance weight pins staked and TIG-welded to the plate
• Nylon bushings on advance weights for smooth, consistent operation
• Easy-to-adjust mechanical advance with supplied springs and stop bushings
• Mechanical advance assembly lockout for crank trigger systems
• Maintenance-free magnetic pickup with precision reluctor
• Supplied with Cap-A-Dapt and race rotor (accepts MSD socket-style caps)
• Must be used with MSD 6, 7, 8, or 10 Series ignition control
• Distributor height from intake manifold: 8.4375 inches
• No CARB Exemption Order Number — legal for off-road/racing use only

The MSD 8582 is sold individually and includes the Cap-A-Dapt adapter and race rotor. This distributor is intended for use on uncontrolled (non-emissions controlled) vehicles or vehicles used solely for closed-competition racing.