QUOTE(Dave_Darling @ Apr 27 2015, 07:07 AM)
I believe that the fronts are all the same, all years.
The 70-71 had two different styles for the rear valance. Both were taller than the 72-76 version, and both had a "porthole" for the tailpipe to come through. The hole for the 914-6 version was in a different location than that for the 914-4 version.
All of the 72-76 cars had the shorter rear valance shown in your photo. This one had a notch for the tailpipe.
Interestingly, the 914-6 rear valance only fits the 914-6 muffler's tailpipe. The 911 muffler (much more commonly available) has a tailpipe which fits the 914-4 valance better than the -6 valance, and the late "shorty" valance fits with the 911 muffler best of all.
Double-check this against what you can find in the "Originality" forum.
--DD
Thank you!