67 barracuda upper ball joints ?????

There are three and possibly four sizes for ball joint sockets . I have four of them and will measure tomorrow . They are worth the price , I have Snap-on ,, Proto ,, and Bonnie ... All of these are 3/4" : drive . It wouldn't hurt to squirt P B Blaster on the ball joints every day for a week prior . You will most likely need a piece of pipe to slip over the breaker bar handle . good luck with it .