Big Block Chevy Long Water Pump All Inclusive Kit

6 Rib Serpentine | Alternator Only Applications | 396 - 427 - 454

The Big Block Chevy Long Water Pump Serpentine Kit provides a clean, reliable serpentine drive solution for 396, 427, and 454 Big Block Chevy engines in alternator-only applications. Built from CNC-machined 6061-T6 billet aluminum with a larger crank pulley for improved accessory efficiency, this system replaces outdated V-belts with smooth, no-slip operation and a compact, modern accessory layout. Featuring high-quality components and a maintenance-free finish, it offers a durable and efficient upgrade for classic builds needing dependable Chevy Big Block serpentine performance. **This is the all inclusive version of this March Serpentine Conversion System found here.

Application:

Chevy Big Block

Kit Includes:

• Billet GM 10si 140 AMP Alternator OR 100 AMP Chrome 10si
• Alternator Pulley and Cover
• Alternator Fan
• Long Water Pump
• Water Pump Pulley
• Alternator Bracket
• Crankshaft Pulley
• All Mounting Hardware

Notes:

• Will not fit in Chevelle, Monte Carlo, El Camino, 1970+ Camaro, S10, 70+ F-Body, 78-87 G-Body and 64-77 A Body due to gearbox interference.
• Billet power steering pumps may require modification to AC bracket for 508 compressors
• Pre-1982 Corvettes require cross member modification
• Designed for standard deck height motor. Tall deck requires use of 20128-09

Instructions:

20125, 20150, 20152, 23045, 23070, 23090