need help /6

My Valiant has been sitting in a pasture since 1983. It would sputter and try to fire, but not quite catch.
Changed points, plugs and starter, finally got it to catch and barely run for about 5 sec. then it smoothed out and ran great. I think the valves were carboned up and after sitting for so long, the stuff would hold the valves open. It just had to run and clear its throat.
Outside of changing the hoses and fuel lines, I haven't even opened the carb yet. Of course; I don't leave town with it............yet.