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Has anyone tried this? I've now seen this posted in a few places. Car Craft magazine had an article on it in Sep 2002. For '67 and later Mustang/Cougars (& other similarly configured Ford/Mercury) the upper control arm holes are moved DOWN 1" 90 degrees to the existing holes (not vertical to ground).
The benefit of this alteration is to maintain negative camber while going through a corner. Apparently Ford Engineering provided this information to Shelby and he incorporated this into all his Shelby Mustangs. I've already drilled the holes and will incorporate this change when complete. BTW, this change effectively lowers the vehicle about 1".
Instructions
Jack car, remove front wheels and front shock absorbers.
Compress spring and remove.
Support lower control arm and brake assembly on a jackstand.
Unbolt control arm bolts from the inside of the engine
compartment. For '64 - 66 years, save aligment shims
and remember their original location.
Move the upper control arm, rotor, and spindle to one
side. Support brake lines.
Bolt the template to the existing holes.
Mark new holes with a center punch.
Drill new holes. Start with a small bit, 1/4", and
work up to 17/32".
Install upper control arms in new holes. For 1964-66, use the alignment shims in the same original positions. Remove an even thickness, about 1/8" to 1/4", of shims for each position to compensate for the increased positive camber.
Reassemble suspension.
Align front suspension to the following
specifications:
Caster 2 degrees positive
Camber 0 to 1/2 degree negative
Toe-in 1/8"
Template courtsey of the Shelby American Automobile Club and Mustang Performance and Handling Guide, 1964-85, by Peter C. Sessler.
The benefit of this alteration is to maintain negative camber while going through a corner. Apparently Ford Engineering provided this information to Shelby and he incorporated this into all his Shelby Mustangs. I've already drilled the holes and will incorporate this change when complete. BTW, this change effectively lowers the vehicle about 1".
Instructions
Jack car, remove front wheels and front shock absorbers.
Compress spring and remove.
Support lower control arm and brake assembly on a jackstand.
Unbolt control arm bolts from the inside of the engine
compartment. For '64 - 66 years, save aligment shims
and remember their original location.
Move the upper control arm, rotor, and spindle to one
side. Support brake lines.
Bolt the template to the existing holes.
Mark new holes with a center punch.
Drill new holes. Start with a small bit, 1/4", and
work up to 17/32".
Install upper control arms in new holes. For 1964-66, use the alignment shims in the same original positions. Remove an even thickness, about 1/8" to 1/4", of shims for each position to compensate for the increased positive camber.
Reassemble suspension.
Align front suspension to the following
specifications:
Caster 2 degrees positive
Camber 0 to 1/2 degree negative
Toe-in 1/8"
Template courtsey of the Shelby American Automobile Club and Mustang Performance and Handling Guide, 1964-85, by Peter C. Sessler.