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want to do this upgrade I have the servo and modded bracket but the master cylinder I have is a abs one with two ports is this advisable to use or am I best getting a non abs with four ports
Go for non abs. What size is it? You can often swap in from other brands. The pug 405 non abs is 22mm I think. There is a Passat vw one similar I think.
I think I have the two port version (I will check!) as this suits my set up well as I use a front/rear split with a willwood adjustable bias valve for the rear. Just set it up in the rain so that the rears never locked up and left it alone.
Threw all the escort ABS stuff away, including the rear proportioning valves which commonly seize and don't work, new copper lines, welded up a pair of brackets and was happy with the result.