Sierra 18-5313-1 GM V8 DistributorContact Controlled 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; Standard rotation; Replaces: Crusader; 37061; Johnson/Evinrude; 985560; Mallory; YL624AV; Mercruiser Stern Drive; 68521A4; 68521A3; 74905A3; 91823A3; 13447A1; 816148A1; 17177A1; OMC; 985560; For most GM V-8 Engines (small & large blocks)Uses: 18-5251 TUNE-UP KIT And 18-5376 CAPs/s from 18-5313