Sierra 18-5316-1 GM V8 Distributor - Replaces Mallory YL624BVSierra 18-5316-1 Distributor fits most GM V8 engines. Rotation: Reverse Rotation; Stabilized points eliminate point float and bounce; High dielectric condenser with brass case eliminates corrosion; Mylar insulation provides greater protection against current leaks and shorting; Super Duty cap and rotor; Self-Lubricating bushings; Interchangeable with: Mallory; YL624BV;