The size of the bolts for the flywheel housing (bellhousing) to the engine block on a 5.7L Chevy small-block varies slightly depending on the year and specific application. However, they are almost universally
7/16"-20. They are typically coarse thread.
It's crucial to verify this with a parts catalog or a service manual specific to your engine's year and model. Using the wrong size bolt could lead to serious engine damage. Don't rely solely on this information; always double-check.
