http://dirtyhipporacing.com/2013/02/21/ford-mustang-track-pack-dissected-by-part-number/

Looks like the track pack gets most of the parts of the Boss sans intake cams forged internals and tune.

Another link shows the difference in spring rates vs different packages from the Secretariat to The Boss 302.

http://www.brembo50.com/Default.aspx?pageId=1130035

Last edited by PHJ426; 10/09/13 10:54 AM.