Q-jet inlet nut - removing safely

[fortop]

Greenhorn question: I have an 83 C20 454 with Qjet carb and inlet nut fuel filter. I need to send the carb in for rebuild. What is the proper way to remove the hard fuel line at the inlet nut? I had a previous C20 with a leaking inlet nut and don't want a repeat of that experience. Looks like the threaded fitting on the end of the hard line at the inlet nut already has rounded shoulders, so I am nervous about removing it an causing any more damage. Do I loosen that hard line nut first, or loosen the inlet nut from the carburetor first? Thanks for any tips/info you can provide.

[citydriver]

Loosen the fuel line nut first. Use a wrench to hold the inlet/filter nut in place while you do this to prevent the line from twisting.

[fortop]

Loosen the fuel line nut first. Use a wrench to hold the inlet/filter nut in place while you do this to prevent the line from twisting.

 

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Thanks. It took a lot of firm tapping on the wrench but I got it loose. Somebody put a lot of sealant on the threads which made the task difficult.