http://www.s-series.org/htm/tech/GeneralEngineSpecs.htm
From s-series.org Break down by year and engine as to HP and Torque output. Questions is, is performance based on HP alone, 1/4 mile time. what? I think I'd rather have a late model Vortec 4.3 than a vin Z from 95 back. Excluding the LB4...