At Carolina Classic Trucks, we are offering top-notch 1978-87 Chevy and GMC Full Size Truck Front Disc and Rear Drums Brake Proportioning Valve. This high-quality valve is essential for maintaining proper brake balance in your truck. Contact us:- Address: 5820 N. Church St. Ste. D Box 113 Greensboro, North Carolina, United States 27455 Phone: 336-337-2132 Email: [email protected] Website :- https://www.carolinaclassictrucks.com/