i installed a kit from performanceonlne.com in my 57.
7 inch booster with dual master and 5 lug front disc with newer style roller bearings.
http://www.performanceonline.com/store/customer/home.php?cat=1061you can also get the 6 lug version.
it bolts directly, (with their supplied mounting bracket), to the original under the floor location, utilizing the original pedal.
although i ran into some install problems, like anything else, when it was done i am 100% happy with the results.
no more 2 foot stopping. LOL.
stops as good as my 2003 s-10.
http://s251.photobucket.com/albums/...00/?action=view¤t=DSC01539.jpgleonard