Customer spare, fits SBC standard cam height. Sent into BR Motorsports for full rebuild and blueprinting. MSD Pro Mag 12, new bronze gear and roll pin, wires tested good. Never installed or used, been sitting in bubble wrap since return from BR. MSD box or wiring harness not included. All items are for sale locally and can sell to a walk in customer at anytime ending the sale on here. Make sure the item is exactly what you want as no returns are accepted. Payment is due in full at time of transaction or sale is voided.