Pitman arm?

[ncracer1st]

What pitman are should I use with metric chassis with older style box?

[HEAVY DUTY]

The small metric arm is about 6 3/8" center to center, and is the only one that will work right. The factory one has the last 3 numbers 464 casted on it. The Camaro arm is about 3/8 longer and will cause the tie rod to hit the frame.