SBC Vacuum Pump Drive Kit

The MOROSO SBC Vacuum Pump Drive Kit (part number 63859) is a crank mandrel drive system engineered for small-block Chevy applications requiring vacuum pump auxiliary drive capability. This kit features a 4-inch long mandrel with Gilmer and V-belt pulley options, providing flexible mounting configurations for engines where vacuum demand exceeds natural manifold supply—common in street performance builds, forced induction applications, and vehicles with aggressive idle characteristics or large displacement variants.

The mandrel length and dual pulley compatibility allow builders to integrate vacuum-assisted brake systems, power steering assist, or other vacuum-dependent components without compromising engine bay layout. Gilmer belt drive offers superior grip and synchronous power transfer compared to traditional serpentine routing, while the V-belt option accommodates installations where existing accessory arrangements prevent centralized hub mounting. The kit mounts directly to the small-block crankshaft, utilizing the front damper area for secure, mechanical integration with minimal installation complexity.

This solution targets engine builders, performance shops, and street rod enthusiasts who need reliable vacuum generation without relying on manifold depression alone. Common applications include carbureted performance engines, crate motor installations, and restorations where original vacuum routing is impractical or insufficient. MOROSO's reputation for quality engine accessories makes this kit a trusted choice for SBC platform modifications requiring auxiliary drive systems that demand durability and straightforward installation.

Weighing 5.25 lbs with compact overall dimensions of 4.5 x 4.3 x 11.6 inches, the kit integrates efficiently into tight engine compartments while providing the mechanical advantage needed for sustained vacuum output during idle, cruise, and transient throttle conditions typical of street-driven small-block Chevy platforms.