Ok, time to measure the length of a lower control arm.

1962 to 1972 B bodies & 1970 to 1974 E bodies all use the same length of lower control arm.

On these cars, the main difference on the lower control arms is the position of the sway bar mounting tab IF the car was equipped with a sway bar at all.
1966 to 1969 sway bar tabs are positioned more outboard (towards the ball joint) than 1970 and later sway bar tabs.

If you plan to use the wider 1966 to 1969 sway bar with disc brakes, make sure that it doesn't hit the brake caliper when turning the steering all the way lock to lock.
It should work fine with 1966 to 1969 disc brakes, but if you're installing 1970 or newer brakes on an older car, you may have interference issues.

The 1970 and later lower control arms that use the narrow sway bar can be installed on older B bodies with careful drilling and clearancing to route the later sway bar through the K member instead of in front of it.


These pictures are of a 1970 to 1972 B body & 1970 to 1974 E body lower control arm with a sway bar tab.

The first picture shows pretty well how the measurements were taken from the centerline of the pivot to the center of the ball joint hole. 12 9/32 inches
I also measured from the centerline of the pivot to the center of the sway bar hole. 6 7/16 inches

The second picture looks a bit odd due to the perspective of the photo, but seeing it from this angle may help some people to envision the movement of the lower control arm.


I'M CERTAINLY NOT A SUSPENSION EXPERT, SO IF YOU SEE SOMETHING WRONG WITH THE MEASUREMENTS OR INFO, PLEASE SAY SOMETHING!