If it has an electric fuel pump, keep it and if it's bad replace it. On my 65 Fury, the manual push rod was damaging my cam so I took it out and replaced it with an electric. When I turn the ignition on, it runs for a few seconds to fill the carb and shuts off and I get a quick start and it then runs again! Turns out, the best thing I ever did; starts quick without spending a half a day pumping the foot pedal, saving the starter and battery, and when it's running, no hiccups like I had with the manual! Did the same thing on my 66 GTO which has the tri-pack and which was hard to start after it sat for just a week or even a few days; big help starting but I kept the manual and after it starts the electric shuts off! See Big John's comment herein, fully agree!