; Fits: Small Block Ford 302-351W with either 3 or 4 mounting bolts, (3.30 bolt circle, 2.432 male register - will not fit 289); Hub mounted to harmonic balancer; 6061-T6 Aluminum Pulleys are hard coat anodized for strength and extended service life; Includes: 2-1/2 V-belt pulley for vacuum pump, 1 (16-tooth) Gilmer pulley for external oil pump, guide plates, assorted spacers, belt guides and hardware