Eckler's no longer carries the Firebird Leaf Spring Shackle Nuts, 1967-1969 .
Please check out 1967-1969 Pontiac Firebird Suspension for an updated selection.
These are the correct size (11/16") hex and style (MARSDEN) nuts originally used on all rear shackles. Sold in pairs, for each shackle or both motor mounts.