Here are the listings from CJ's
http://www.emustang.com :
1964-1970 Torque Box left rear upper 11" x 9 3/4" M130L 22.95 Each
1964-1970 Torque Box rt rear upper 11" x 9 3/4" M130R 22.95 Each
1964-1970 Torque Box left Cv M114L 36.95 Each
1964-1970 Torque Box rt Cv M114R 36.95 Each
1964-1970 Torque Box left Cp Fb fits 71-73 w/ modification M117L 39.95 Each
1964-1970 Torque Box rt Cp Fb M117R 39.95 Each
1971-1973 Torque Box Cp Fb left rear M430AL 139.95 Each
1971-1973 Torque Box Cp Fb rt rear M430AR 139.95 Each
I'd say to give them a call to find out for sure if you can't get anyone to answer you definitively... 1-800-888-6473