I have a problem with the brakes on my lude, sometimes they work just fine, and other times I'll be stopped and they will slowly go to the floor, I'm thinking it could be the master cylinder??? Also ever since I put the engine in, the clutch seems to slip in first, and grinds a little going into fith, could this be in the pedal, or in the cable??? It has a new clutch, pressure plate, and I had the flywheel resurfaced. I'm confused!

When I first got this car running, and drove it, the ABS light would come on, and go off at different times. Since I got it back the light does not come on anymore. They could have done something to make the light stay off!?!?!