Just wanted to list this info from these magazine tests I kept because I still own my bought new 1978 Z28. Hope this is of interest to you guys. From Road Test Automotive Entertainment in Spring, 1978: 1978 Z28 49 state or federal version with 4 speed- 0-60 in 7.9, quarter mile in 15.8 at 88.3. Car and Driver from March, 1978: again the federal version with 4 speed- 0-60 in 7.3, quarter mile in 16.0 at 91.1. I never did run mine to see what it might do; mine is the California version with 175 hp and 265 ft./lbs. of torque with auto trans and 3.42 rear end. The federal version had 185 hp and 280 ft./lbs. of torque, and if it had a 4 speed (not available in California) 3.73 rear end.