Mr Gasket ring gear spacer kit. This ring gear spacer allows you to use a 3-series gear (3.08/3.23/3.42/3.73) on a 2-series carrier (2.41/2.56/2.73) without changing the carrier. Installs between 2-series carrier and 3-series ring gear, includes longer bolts.
Fits the following:
67-72 Camaro & Firebird with 12-bolt rear differential (disc or drum) with 2-series carrier