This is the first year of M-body made. While not a Fifth Avenue this was the first Chrysler, a LeBaron.
A 1977 LeBaron coupe. Must be rare, now anyway, because this is the first 77 coupe I've run across so far.
Picture courtesy of magnumxe.com.
I'm assuming this is a 1977 LeBaorn, this is Mopar Scott's car, picture taken at Carlisle 2001.
