 Two engines (the LS6 and LS7) were listed on early specification sheets and in some sales brochures but never made it into production.Besides the base model, buyers could select the Rally Sport option with a distinctive nose and bumper, a Super Sport package, and the Z-28 Special Performance Package (priced at US$572.95) featuring a new high-performance LT-1 of torque V8.The LT-1, an engine built from the ground up using premium parts and components, was a much better performer overall than the previous V8s used in 1967-69 Z-28s; greater torque and less-radical cam, coupled with the 780 cfm Holley four-barrel, permitted the Z-28 to be available with the 3-speed Turbo Hydramatic 400 automatic transmission as an option to the four-speed manual for the first time.