🛠️ OEM Delco-Moraine Master Brake Cylinder – Cast #5452810 / Code AT
 
Factory Original | 1968 Cast Date | Wide GM Fitment
Up for sale is an OEM Delco-Moraine master brake cylinder with casting number 5452810, code AT, and K-1-1968 cast date. This unit was used across a wide range of 1967–1970 GM vehicles, depending on brake system configuration (manual vs. power, drum vs. disc). Ideal for authentic restoration or correct-spec replacement in vintage GM builds.
📐 Fitment Compatibility: Note below are some applications I found are applicable, but there may be more. Check your Fitment carefully. 
Chevrolet:
1967–1969 Impala, Caprice
1968–1970 C10/K10 & C20/K20 Pickup
1968–1970 C10/C20/K10/K20 Suburban
1967–1970 Bel Air, Biscayne
1967–1968 manual drum brake applications
Pontiac:
1967–1968 manual drum brake models
GMC:
1967–1970 C15/C1500 & C25/C2500 Pickup
1968–1970 C15/C1500/K15/K1500 & C25/C2500/K25/K2500 Suburban
Corvette:
Select models used similar master cylinders; bore size and brake configuration may vary
📦 Product Details
Manufacturer: Delco-Moraine
Casting Number: 5452810
Date Code: K-1-1968
Brake Code: AT
Condition: OEM Used – verify bore and piston condition prior to installation
⚠️ Important Notes
Please confirm brake system type (manual/power, drum/disc) before purchasing, 
No returns accepted on this item