Thanks Jeff. Yes, it's a single exhaust, 260 v8. My guess is that they are mounted outboard between the outside portion of the rail and the trunk drop off. Still not quite sure if the hook attachment point, (round hole), is facing forward or towards the rear valance. Since it sounds like there is no definite "protocol" on this, would an early 65' pic be better than my guess?? Same plant, single exhaust.. If you have any..