Opti-Spark Ext. Harness
Upgrading your LT1 to the later 95-97 style distributor allows you to take advantage of the cross ventilation that prevents ionization and moister build-up under the cap. It also allows you to use aftermarket roller timing chainswhen building a stout LT engine. The later style utilizes a different connector so you'll need this extension harness to complete the swap. This is an exact replacement for the O.E. harness.