Brass fittings on fuel line

[Jr]

Hello,
After I replaced the fuel pump on my 350, I have a fuel leak out of the brass fitting connected to the fuel pump to the carb(still using the hardline from the factory). Is there a trick to working with the brass? This little piece of brass has be frustrated like you wouldn't believe(some of you may understand where I am coming from). I would appreciate any help on this subject.

David

P.S
This is on my 70 C-10.