The master cylinder is easy to get to.  Pull the top off the instrument
cluster by grabbing at the back, pulling forward and lifting.  Then pull the
instrument panel out.  4 screws, disconnect speedometer cable (just pull
back connector and slip out), and then disconnect electrical connectors that
simply plug in.  At that point the booster and master cylinder are exposed.
No need to go under the dash.  Good luck!
Steve Sandlin
http://www.steveslockshop.com
'84 Wolfsburg Westy
'79 Transporter
'00 New Beetle
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