64-67 Chevy II Only

The MELLING M-73 oil pump for 64-67 Chevy II models is a wet sump internal oil pump engineered to deliver standard volume and pressure circulation to Small Block Chevy engines. This pump is the correct OEM-type replacement for second-generation Chevy II vehicles running classic Small Block powerplants, ensuring proper lubrication flow during idle, cruise, and sustained high-rpm operation.

As an internal wet sump design, the M-73 mounts directly within the engine block and draws oil from the pan through a pickup tube, circulating it throughout the engine's bearing surfaces and oil galleries. Standard volume output matches the factory specifications of first and second-generation Small Block Chevy engines, while standard pressure relief settings protect against over-pressurization while maintaining adequate film strength across bearing clearances. Weighing 3.6 lbs with compact dimensions (5.1 x 4.2 x 6 inches), it integrates seamlessly into the original engine bay layout without modification.

This pump is essential for Chevy II owners rebuilding or restoring 1964–1967 models with Small Block engines. Whether performing an engine rebuild, replacing a worn pump, or completing a period-correct restoration, the MELLING M-73 provides OEM-equivalent reliability and fitment. It's the direct replacement specification for these years and engine configurations, eliminating guesswork during assembly.

MELLING is a recognized manufacturer of engine oiling system components, and the M-73 carries the engineering standards expected for Small Block Chevy applications across classic and muscle car platforms. Proper oil circulation is fundamental to engine longevity; a correctly specified pump ensures consistent pressure and flow under all operating conditions.