Billet Specialties exclusive design features a 100% precision machined billet aluminum timing cover that supports all components. There is no need to tap into the block. The Tru Trac serpentine system fits 289, 302, and 351W motors. The Tru Trac for small block Ford fits in the tightest engine bays. Perfect for muscle cars and street rods! The Tru Trac’s OE styling gives your motor a clean, professional look.