BBC (66-93) Early Serpentine Conversion Kit with Crank Pulley Adapter - K10473

What’s included:

Adapter plates made of 6061-T6 aircraft grade aluminum (brushed satin finish)
CNC machined crank pulley adapter
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)

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

The brackets should include the idler and tensioner.

Air conditioner compressor (from donor vehicle)

Note: A good reason to use a 1994 and up compressor is that the compressor will use R134a refrigerant.

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 should have the correct pulley. (The pulley with flanges does not work)

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

A small-block crankshaft pulley (from donor vehicle)

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

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

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

Don't want to run AC? Here is the adapter to do that!

View the SBC AC Delete pulley: (Kwik Performance PN 34152).

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

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

Big Block Spotters Guide (Adobe pdf File)

Gates Belt Chart (Part number and length)

• Which engine does this kit fit? It is designed for Big Block Chevy (BBC) engines manufactured between 1966 and 1993 with a Mark IV harmonic balancer. It works for both standard and tall deck engines.
• What donor vehicle parts do I need? You will need the AC and Alternator/Power Steering brackets from a 1988-1995 Full Size Truck (5.7L, 5.0L, or 4.3L) or a 1987-1995 S10/Blazer (4.3L).
• Can I use this kit if I want to delete my AC? Yes, you can use an AC Delete pulley (Part number 34152) if you do not wish to run an air conditioner compressor.
• What type of water pump is required? You must use a reverse rotation water pump from a 1988-1999 454 engine. A standard rotation pump will not work with this serpentine belt routing.
• Do I need specific pulleys? Yes. You need a smooth water pump pulley (GM Part number 10085760 or 19418445) and a Small Block Chevy (SBC) crankshaft pulley from the donor vehicles mentioned above.
• Are the bolts included? Yes, the kit includes zinc-coated fasteners for the adapter plates and for attaching the OEM brackets. It even includes both 3/8" and 7/16" bolts for the passenger side head to account for year-to-year variations.
• What belt should I use? The kit uses a standard six-rib belt. Our included installation instructions will have a suggested length and a Gates part number. Our website also has a Gates Belt Chart with other part numbers and lengths in case  your final configuration is different.
• Can I use a newer AC compressor? Yes, using a 1994 -95 compressor is recommended as they are designed for R134a refrigerant.
• Can I use a compressor other than the GM R4.  Yes, we offer a conversion kit that lets the Sanden Mini compressor (SD7B10) bolt in place of the R4. See part number K10606.