7`s are hotter than 8`s in NGK`s............didn`t notice if you had a wideband or not but tuning idle, cruise and wfo can be a bear w/out one............doable yes but a bear otherwise especially if you have an off idle stumble and don`t know if it`s rich or lean.
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
