Description
The ARP 135-7903 oil pump drive kit is listed for Chevrolet Big Block 400 raised camshaft. The shaft transfers drive to the oil pump, so engine configuration, shaft length and engagement at both ends are central to correct selection.
Technical Highlights
- Manufacturer part number: 135-7903
- Application/configuration: Chevrolet Big Block 400 raised camshaft
Selection Guidance
Block deck height, oil-pump design and the drive arrangement can change the required shaft geometry. Select the exact application rather than substituting a shaft based only on engine displacement.
Confirm the block and oil-pump combination, including any raised or tall-deck requirements stated for the part.
Installation Considerations
Trial-fit the pump and drive assembly to check engagement, retention and free movement. Complete the engine builder’s oil-system checks and priming procedure before initial startup.