Brake Master Cylinder — 1974 Corvette
Vehicle & Part Overview
The 1974 Corvette uses a dual-circuit master cylinder, which was standard by that era and is an important safety feature to preserve in any replacement.
The correct unit depends on your brake configuration:
- Power brakes — larger bore, typically 1-1/8 inch
- Manual brakes — smaller bore size
Matching the bore size to your specific setup is essential before ordering.
Before purchasing, pull the original unit and check the casting number on the body. This confirms whether you have the original Delco unit and helps identify the correct replacement — particularly important for restoration work.
Sourcing Recommendations
Zip Corvette Parts — specializes exclusively in Corvettes and stocks correct units for both power and manual brake configurations.
carspanner.com/go/zip-corvette-parts
Mid America Motorworks — carries both replacement and restoration-quality master cylinders.
carspanner.com/go/mid-america-motorworks
Corvette Central — focuses heavily on concours-correct parts; recommended if you need a date-coded, original-style unit for a show car. They can also help identify correct original casting numbers.
carspanner.com/go/corvette-central
Fitment & Restoration Notes
- Confirm power vs. manual brake configuration before ordering — bore size differs between the two
- Check the casting number on your existing unit to verify originality
- For a show or concours restoration, prioritise a date-coded correct unit from a specialist such as Corvette Central
- For a driver-quality repair, a quality replacement unit from Zip or Mid America is appropriate and more readily available
Safety note: The dual-circuit master cylinder is a critical safety component. Ensure any replacement unit is correctly rated for your brake configuration and inspect all associated brake lines and hardware when replacing.