i have a 89 with e7 ported heads ,gt40 intake ,msd 6al ,msd dist,mac headers, 190 fuel pump, 24lb ijector, and mass air, b303 with 1.7 rockers. the went 12.7 @107 at the track, on my way home i bent 16 valves as anyone had problem with ptvc. when i clayed it was ok