QUOTE(sixaddict @ Dec 23 2013, 06:32 PM)
While I know rear valance from 70-71 -4 to -6 differ. However can't see difference in fronts ....can anyone define with accuracy......I.e. Measurements
Thanks
First, the rear valences were the same for fours through the 72 model year, not 71. They were of the "snowplow" variety. Yes, the fours and sixes had different tailipe openings and position.
The front valences were identical, regardless of model. A six would fit a four with no modifications. The measurements are identical between model.