1985 Cabriolet Frequency Valve

Hi everyone,

This is my first post here and I am a new cabby owner however they have been in my family for years. 

The day after I brought the cabriolet home it was leaking fuel on the front drivers side from the injection areas back side. I pinpointed it to the frequency valve which was soaked and then would dry quickly after turning the vehicle off. I purchased a used part because it is all but impossible to find these things new and the hard plastic inside the line is cracked. Now I am at a "how do I remove and replace this thing" part of the job. 

Any advice would be helpful!