What gn rear end is casting number 1254332?

The casting number 1254332 is associated with a 10-bolt rear end used in General Motors vehicles, specifically from the 1970s. This rear end is commonly found in Chevrolet models and is part of the GM 10-bolt family, known for its strength and versatility. It typically features a 7.5-inch ring gear, making it suitable for various applications, including performance builds.