Picked up a slant for the first time

For your purpose, a super six is probably the best, but people now think they are made of gold. If you do find one for a reasonable price make sure you get everything, mainly the trans kickdown linkage. You could probably get a Offie manifold and a small 4 bbl (or 2bbl adapter) carb for the same or less money.
Stock exhaust manifold, but a 2 or 2 1/4 pipe, and free flowing muffler would not hurt. But before doing anything, I would check the basics. Adjust valves, then compression check, Maybe electronic ign, and adjust timing, maybe a little more advance. Of course check/change plugs, cap, rotor, wires, PCV (make sure the passage in the carb is clean), air filter. Drive it to see how it acts, stock, before doing mods.
PS: A friend here in Florida had one similar, and his estate was selling it.
If you or a friend has fabrication skills, a great alternative to buying an overpriced 2bbl Super Six intake manifold is modifying a cast aluminum 1 bbl manifold to fit a 2 bbl carb. The factory Super Six manifolds have the exact same runner size as the 1 bbl manifolds. The cast aluminum 1bbl manifolds save weight and can be welded on.
Also, I disagree that a full kit is the best way to go. A Locar Kick Down cable is much simpler than the factory piece, easier to adjust and eliminates the issue of working with 50 year old mechanical linkages.
Good 2bb Holley 2280 carbs are out there.
As a substitute for the factory air cleaner housing. Consider a carb hat, remote air cleaner and a cold air intake duct, or the factory air cleaner if that is what you want. Then you are only looking for the 2 bbl housing and lid, not the complete kit.