From what I recall it had a Cleveland in between the front fenders.
I'd suspect that this book has information about them.
Amazon product ASIN 1855202093
View: https://www.amazon.com/Performance-Mustang-1974-78-Brooklands-Tests/dp/1855202093
I'd suspect that this book has information about them.
Amazon product ASIN 1855202093
View: https://www.amazon.com/Performance-Mustang-1974-78-Brooklands-Tests/dp/1855202093