Your car was a factory console shift, but you have upgraded to a late model transmission. This indicator is the answer for you. Fits back into your console without any modifications.
Vehicle Fitment
1968-70 Chevelle with Console with 2004R
1968-70 Malibu with Console with 2004R
1968-70 El Camino with Console with 2004R
1968-70 Chevelle with Console with 700R4
1968-70 Malibu with Console with 700R4
1968-70 El Camino with Console with 700R4
1968-70 Chevelle with Console with 4L60
1968-70 Malibu with Console with 4L60
1968-70 El Camino with Console with 4L60