Welcome!
Just as backinblack said, check out the suspension fourms. Tons of great info there.
If you want to know for sure what your build number is call: 1-800-FORD-SVT. Give them your VIN number and they will tell you your build number/production date. You can also get a certificate with that info on it by sending a copy of your registration and they will mail you out the cert.
Enjoy the site!
