Also did my fuel lines just like you, and never had a problem. But I read about guys having issues with them coming off, if I were to do it again today, I'd do the Dorman kit with the L67 style fittings, or get some kind of safety wire (read: zipties) around the back of the line to the rail to ensure it can't physically come off.

Is the vac line that goes from the firewall to the top of the blower cut?