I found this forum by doing a google search on the problem I am having with my 98 z28. I live in Frederick county Maryland and this is my third z, but first with the 6spd. I knew when I bought the car that the throwout bearing was making noise but at the price, was ok with that. In my search and the posts/responses from this web site I have bought a Spec clutch, new slave and plan on doing the drill mod (on existing) when the clutch install is being done. Can anyone advise if there will be any SUPRISES when I exicute my plan. Modifiying existing master cylinder restricted line is my only real concern. Thanks, and happy driving.