The repop 67-68 rear valences are about 3/8" - 1/2" too narrow. Very difficult to get them to fit properly.
I took an original valence down to the Mustang parts place and compared them myself.
My body guy asked if I was going to use a repop rear valence because if I was he was going to position the rear quarters closer together to make up the gap!
they are all like this.
1967 Shelby GT350, dark green, 347 stroker, 5-speed, inboards, #2206
1973 Mustang Convertible, white/white, black stripes, Q-code (351C-4V), ram air.
1968 1/2 428 CJ convertible, R-code, red/deluxe red, auto, finally finished.
"If you find the car of your dreams, ignore the price guides and pay whatever you have to in order to get it."