What sort of state is it in? Is there anything in the tank now. Basiclly curing is the process of rotting off dead stuff, and it's a good idea to keep ammonia levels reasonable else they'll kill anything that's still alive. Why not put it in the 16 gallon, and kee p an eye on ammonia levels, and do big water changes as required?
That assumes the tank is empty, and you can stand the rotting smell