Carb bodies are not pure aluminum but yes, aluminum corrodes. Corrosive residue from evaporated gaslline is not kind to the carb alloy but a carb simply drained before storage won't corrode much at all. Bodies with terrible looking corrosion will often still be usable, a bit of pitting that doesn't destroy anything won't be fatal.
Head porting for a specific cam grind does not make sense to me. Porting aims to improve gas flow in and out of the cylinder. Why would if matter what cam is used?
Cam grinds range from stock to extreme race profiles, with a detour for forced induction. There is no magic super cam grind, for any gain you also lose something. Race grinds that give impressive horsepower at high rpm are generally unusable for street riding.
I think looking for a cam that suits your riding is a better idea than searching for an Andrews A because the head was "ported for it".