BBC (94-00) Early Serpentine Conversion Kit with Crank Pulley Adapter - K10543

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 (1994-2000)

366, 396, 402, 427, 454, 502, 572

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.

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

A small-block crankshaft pulley (from
donor vehicle)

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.

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)

Q: What’s the primary purpose of the K10543 conversion kit?

A: This kit consists of a set of adapter plates that allow you to bolt on a factory Small Block Chevy serpentine system to a Big Block Chevy engine. Using these widely available OEM brackets allows for a reliable serpentine setup without the high cost of aftermarket billet systems. This kit also includes a crank pulley adapter that lets you re-use your SBC crank pulley.

Q: Which engines does this kit fit?

A: It is designed for Big Block Chevy (BBC) engines manufactured between 1994 and 2000 with a Gen 5 or Gen 6 harmonic balancer. It works for both standard and tall deck engines.

Q: What donor vehicle parts do I need?

A: You will need the AC and Alternator/Power m   Steering brackets from a 1988-1995 Full Size Truck (5.7L, 5.0L, or 4.3L V6) or a 1987-1995 S10/Blazer (4.3L) V6.

Q: Can I use this kit if I want to delete my AC?

A: Yes, you can use an AC Delete pulley (Part number 34152) if you do not wish to run an air conditioner compressor.

Q: What type of water pump is required?

A: You must use a reverse rotation water pump from a 1988-2000 454 engine. A standard rotation pump will not work with this serpentine belt routing.

Q: Do I need specific pulleys?

A: 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.

Q: Are the bolts included?

A: 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.

Q: What belt should I use?

A: 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.

Q: Can I use a newer AC compressor?

A: Yes, using a 1994 -95 compressor is recommended as they are designed for R134a refrigerant. 

Q: Can I use a compressor other than the GM R4?

A: Yes, we offer a conversion kit that lets the Sanden Mini compressor (SD7B10) bolt in place of the R4.  See part number K10606.