With the red drums in evidence - it could have either 14 or 15" Rallye wheels....or 14" Road wheels.
Is the original spare in it? If it has a space saver then it was more than likely 15" Rallye wheels.
I'll ask around on Shaker Emblems....check Ebay...but be careful!
Have a look at Barry Washington's site....lots of good info.
http://www.hamtramck-historical.com/library.shtml
http://www.hamtramck-historical.com/...racuda0032.jpg
http://www.hamtramck-historical.com/...ries%20(3).jpg