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Kwik Performance Inc.  |  SKU: K10270

BBC Late Serpentine Conversion Kit - K10270

$185.00 USD
Shipping calculated at checkout.

Description

Big Block Power. Small Block Budget.

Stop fighting outdated V-belt systems that slip, squeal, and throw belts at high RPM. The Kwik Performance 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.

    What's Included / Other Requirements

    What’s included:

    Adapter plates made of 6061-T6 aircraft grade aluminum (brushed satin finish)

    Zinc coated fasteners

    Bolts for adapter plates AND to attach OEM brackets included

    Both 3/8 and 7/16 bolts are included for the passenger side head, since the holes vary for different years

    What else is required to complete the installation:

    GM BBC engine (1966-1993) -or- (1994-2000) 366, 396, 402, 427, 454, 502, 572

    AC and Alt/PS aluminum drive brackets off of a GM Truck engine listed above in description.

    • The brackets should include the idler and tensioner.

    Air conditioner compressor (from donor vehicle)

    Alternator (from donor vehicle)

    Power Steering Pump(from donor vehicle)

    A smooth water pump pulley is required (GM part number 10085760 or 19418445)

    • Donor engines DO NOT have the correct pulley. (Has different bolt pattern).

    A reverse rotation water pump off of a 1988-1999 454 engine.

    • This is considered a "long" pump and is 7 5/16" from block to fan mounting surface.

    Consider the Gates replacement Water Pump: (Kwik Performance PN 44030).

    A big-block crankshaft pulley, GM part number 10085753 (usually retails for $150+)

    • Solution: We have developed an adapter to let you bolt on the SBC crank pulley from the donor engine.
    • Consider the Crank Pulley Adapter for BBC engines (1966-93): (Kwik Performance PN K10259).
    • Consider the Crank Pulley Adapter for BBC engines (1994-2000): (Kwik Performance PN K10540).

    Donor engine didn't come with crank pulley? We've got you covered: SBC Crank Pulley: (Kwik Performance PN 10085754).

    Six-rib belt, See our included installation instructions for suggested lengths and Gates part numbers.

    Alternator rating and PS pulley diameters can change suggested lengths.

    Always check tensioner marks for correct fitment.

    A tall deck engine will require a belt that is about 1" longer.

    A new thermostat housing may be needed to allow the upper radiator hose to clear the alternator.

    Solution: a swivel-neck housing.

    Upper radiator hose will probably need to change, but your vehicle's stock big-block lower hose, should work.

    Installation Instructions

    BBC (66-93) Late Serpentine Conversion Installation Video (YouTube)

    BBC (66-93) Late Serpentine Conversion Instructions (pdf)

    Big Block Spotters Guide (Adobe pdf File)

    Gates Belt Chart (Part number and length)

    FAQs

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    Kwik Performance Inc.

    BBC Late Serpentine Conversion Kit - K10270

    $185.00 USD

    Big Block Power. Small Block Budget.

    Stop fighting outdated V-belt systems that slip, squeal, and throw belts at high RPM. The Kwik Performance 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:

    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:

     

    Learn more with our Big Block Spotter's Guide.

    View product