tlsracer1000

Hello,I have an issue with a 1985 500 SEC,with 90,000 miles.The issue is a a slight rough idle at intial start up,then it will smooth out ,the car has a complete tune up(new plugs,wires and cap and rotor) done to it,I was thinking fuel related the car just developed a gas leak at the fuel pump area and all rubber lines were dry rotted and cracked and has orginal fuel pump and filter and was planning on redoing all items there(a new pump,filter acculmator and damper unit,and has anyone have any other suggestions perhaps vaccumn lines or something else