Front Master Cylinder

I am going to put a kit in my front brake master cylinder. It is on a 79 mk 2. I went to take the fluid holder off the body and the screws seem real soft. I could feel the screw head slots giving like they were going to strip out. I had the right driver size but was afraid to put much tork on them. Is there something I should know before I screw something up?
Thanks Ron:blink:

id use an impact driver

one of mine came right out...the other needed to be soaked for about 3 days in penetrating oil and whacked a few times before it would budge. be patient!!! steve