i have all lsi brakes on my car thanks to a front ls1 conversion and a 2000 rearend.i apparently 'broke'my stock mc trying to bleed the brakes without the mc cover on.i installed a 2000[lsi]master cylinder today.it totally bolted on other than having to push the proportioning valve down about an inch to get the lines lined up.it seems to work great so far.i bought it at rockauto.