3-Bolt Crank Spacer for Holley Mid-Mount Accessory Drive | 63-77 SBF 289 302 351W | 97-448 SKU: 809512

Crank Spacer for Holley Mid-Mount Accessory Drive | 63–77 SBF 289, 302, 351W

For use with 3.00" length, 3-Bolt Harmonic Balancer

Dial in proper pulley alignment on your Small Block Ford serpentine conversion with this Holley 3-Bolt Crank Spacer, designed for use with the Holley Mid-Mount Accessory Drive System. Many early SBF engines use a 3-bolt, 3.00" damper, and this spacer provides the correct stand-off to position the crank pulley exactly where it needs to be for reliable belt tracking and long-term accessory life.

Machined from aluminum and finished in black, this spacer includes the correct-length crank pulley fasteners, taking the guesswork out of installation and ensuring everything stacks up correctly the first time.

Pro Tip: If you’re not sure whether your engine uses a 3-bolt or 4-bolt damper, check before ordering. Also double-check your harmonic balancer length to ensure it matches the spacified 3.00" length for use with this spacer—using the correct spacer is critical for belt alignment and accessory longevity.

• Required for 3-Bolt Dampers – Designed specifically for Small Block Ford engines with 3-bolt, 3.00" crank dampers

• Corrects Pulley Alignment – Ensures proper spacing for Holley Mid-Mount serpentine systems

• Complete Installation Kit – Includes properly sized crank pulley bolts

• Precision Machined Aluminum – Accurate fit with a clean, durable black finish

• Holley Engineered Component – Built to integrate seamlessly with Holley accessory drives

Additional Info

• Part Number: Holley 97-448

• Engine Compatibility: Small Block Ford 289, 302, 351W

• Year Range: 1963–77 Small Block Ford

• Accessory Drive Compatibility: Holley Mid-Mount Accessory Drive System

Specifications:

• Material: Aluminum

• Finish: Black

• Thickness: 0.950"

• Crank Pulley Bolt Pattern: 3-bolt

• Crank Pulley Diameter: 3.0"

• Fasteners Included: Yes

• Warranty: Manufacturer’s limited 90-day warranty

Holley's 3-bolt crank spacer is a must-have for early Small Block Ford serpentine conversions to get proper pulley and belt alignment with the Mid-Mount system.