Lowering the Front End of a Mustang
One of the Shelby American tricks on the early GT 350s was to lower the body. The factory did this modification to all 65's and the 66's up to and including #252. This was Ford engineer Klaus Arning's idea. Klaus also developed the suspensions for the 427 Cobras and the GT 40. He happened on to the idea of lowering the control arms while experimenting with an independent suspension rear end for the 1964 Mustang. Ford vetoed the extra cost of an independent rear suspension in the Mustang but passed the idea of lowering the car on to Shelby American.
By dropping the height of the body, the center of gravity is lowered. This helped the handling of the car by reducing the body roll by 8% during cornering.
To do this modifications you need:
This will take you at least 4 hours to do this job. Renting a spring compressor will make the job a lot easier.
You'll have to have the front end of the car re-aligned. Get it to a frame shop as soon as you can to save on excessive tire wear. If you have wide tires on the front they may rub the fender now do to excessive positive camber. You can help alleviate that by taking out more shims in the 65-66 or adjusting the lower control arm inner pivot on the 67-70 camber adjusting cam. You can also use spring boosters to raise the front end off the tires or install smaller tires. Using spring boosters kinda defeats the purpose of lowering the car though. If you use smaller tires make sure you have the tires and rims on the car you are going to use when you have the front end aligned. (and take out the spring boosters.)
Alignment specs for lowered Mustangs (only):
Chuck Cantwell, Shelby American GT 350 project engineer recommended 2 degrees positive caster, 1 degree negative camber and 1/8 " toe in for all years of Shelby Mustangs. You can play with settings for different applications.
Here are the specifications for dropping the front end. This is a template to use to drill the new holes. This is a compressed version. Use the view image in your browser to expand this picture to full size before you print it off.