With 3 crew, for ballast I would have 200 lbs of lead and ~500 lbs of meat. I was worried that, with a deep skinny keel and a 14' waterline, the boat could pivot on the keel during a jibe and the high angle of attack on the keel might capsize the boat to leeward. As a learner, I would prefer safety over efficiency, and was just wondering what the safest option would be when running, i.e. if running with the keel down is actually hazardous for this sort of boat.
(Though on second thought, my rudder has ~50% the surface area of the keel, and a stiff grip on the tiller is probably sufficient to prevent the scenario I was describing.)
Anyway, thanks for all the input so far.