Can anyone help me on the value of a 1967 Barracuda Formula S???

I am thinking about taking the following in trade towards my 67 Big Block Corvette Convertible. The only problem is I can not find anywhere another like it to determine it's value. Can anyone here help? It is a 1967 Barracuda Convertible. It is equipped with a Formula S package and a 383/4 bbl, #'s matching engine, factory 4 speed transmission with a 8 3/4, 3.23 sure grip. Front disc brakes with dual exhaust, HD torsions bars and HD rear springs. Midnight blue poly metallic exterior with blue bucket seats with console and original factory shifter. New blue power convertible top with glass back window. D 70 x 14 red streak tires. It is a three owner car with only one re-paint over straight/original sheet metal. Rust free underside. Highly detailed engine bay. 54,832 actual miles. All the chrome and stainless outside the car is excellent. New seat covers and carpet. Original door panels and dash pad. Comes with complete owner history, Galen Gouvier decoding, broadcast sheet, owner's manual, and Chrysler registry letter. Any help would be greatly appreciated.