Ok once again we have ALOT of misinformation in regards to control arm lengths.
Much of this is due to the same bad information being reported time and time again on the internet and some due to being printed in magazines and books. Hopefully we can clear some of that up for everyone.
First and foremost all 79-93 Mustang/Capri front control arms are the same overall length. Only the bushings and ball joints changed over those years. They are all roughly 13" long from centerline of the bushings to the centerline of the balljoint. No I haven't measured one in years, but that is the commonly accepted length. I will correct that number if Jack posts up more accurate information.
The information I have (Mathis Book) shows that the 87-88 T Bird control arms are 13 3/4" long which makes them 3/4" longer than the Fox control arms. All the information I have shows the T Bird arms are identical in construction to the Fox control arms of stamped steel construction, just 3/4" longer.
Again the information I have (Mathis Book) shows the 84-86 SVO control arms are 14" long which makes them 1" longer than the Fox arms and 1/4" longer than the T Bird arms. These arms were originally used under the Lincoln Continental and are unique in that they use a deeper spring pocket, different construction and non serviceable ball joints.
The 94-04 SN95 front control arms are stamped steel construction and are 1.23" inches longer than the Fox control arms. That makes them longer than the T-Bird and the SVO arms. The arms are interchangeable from 94-04, but there are two unique stampings, the 94-98 is the first and the 99-04. The 99-04 stamping allows more turning radius due to a change in the shape of the arm near the ball joint to all for more clearance of the tires.
That should cover the majority of the control arms that are used on Mustangs/Capris for these years. I am going to PM Jack to make sure he can verify my numbers are correct and add any additional information he has.
So to summarize:
79-93 Mustang/Capri front control arm length: 13"
87-88 T-Bird/Cougar front control arm length: 13.75"
84-86 Mustang SVO front control arm length: 14"
94-04 Mustang front control arm length: 14.23"
Trey
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