1971 Chevelle with Ls3/4l80E PSI Harnes and Ecm


Does anyone have an idea why it takes so much Timing back.

Can make something other than the knock sensors Knock retard ??


Thanks for help1971_Chevelle_LS3_4l80e Torqmanagment_KS_LY6.hpt1971_Chevelle_Ls3_4l80e_test.hpl