BBC Late Serpentine Conversion Kit - K10270

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Vortec Serpentine adapters for your BBC Big Block Power. Small Block Budget. Stop fighting outdated V-belt systems that slip, squeal, and throw belts at high RPM. The Kwik Performa nce K10270 adapter plates allow you to bolt a modern, reliable, factory-engineered serpentine system from a Small Block Chevy (SBC) or 4.3L V6 donor engine directly onto your Big Block Chevy engine. The "Junkyard Genius" Strategy Why spend $2,000+ on a custom billet kit? With our adapter plates, you can source high-quality OEM brackets and accessories from millions of common donor vehicles at your local salvage yard: 1996–1998 Full Size Trucks: V8 5.7L and V8 5.0L 1996–2013 Full Size Trucks: V6 4.3L 1996–2004 S10 Pickups and S10 Blazers: V6 4.3L Perfect Alignment: The Crank Pulley Solution Aligning a Big Block balancer with Small Block accessories is the hardest part of this swap. You have three paths: The Rare Find: Use a factory BBC serpentine pulley (if you can find one). The Expensive Route: Buy a new GM 454 serpentine pulley (high cost). The Kwik Way (Recommended): Use the SBC crank pulley from your donor engine combined with our Optional Crank Adapter. This aligns the inexpensive donor pulley perfectly with your Big Block for a fraction of the cost of new OEM parts. We offer crank pulley adapters for Mark IV balancers (1966-93) and for Gen 5 and 6 (1994-2000). Learn more with our Big Block Spotter's Guide. Show more