The Melling M-55A is a standard-volume, standard-pressure replacement oil pump for the Small Block Chevy 327 for 1962-1969 applications. It uses a cast iron housing. Melling classifies this pump as Standard Volume and Standard Pressure, making it a direct-fit choice for rebuilds and performance builds on this engine family.
Specifications:
- Volume / Pressure: Standard Volume / Standard Pressure
- Manufactured volume: Standard Volume
- Housing: Cast iron
- Engine family: Small Block Chevy 327 (1962-1969)
- Part number: M-55A
FAQ
What engine does the Melling M-55A fit?
The M-55A is a replacement oil pump for the Small Block Chevy 327 in 1962-1969 applications. Confirm your engine family and pickup configuration before ordering.
Is this a standard, high-volume, or high-pressure pump?
Melling classifies the M-55A as Standard Volume and Standard Pressure.
Is this a direct replacement for the stock pump?
Yes. The M-55A is built as a standard-volume, standard-pressure replacement for the Small Block Chevy 327 and matches the stock oiling specification for stock and mild rebuilds.
Does this pump include a pickup tube?
Melling lists this pump without a pickup in the box unless otherwise noted. Confirm you have the correct pickup for your pan and block, and check pickup-to-pan clearance during assembly.

