<font face="Verdana, Arial, Helvetica, sans-serif" size="2">The conversion of J/Y to Y seating would likely take about 24 hours and maybe just overnight once they rolling.</font>
Then I wonder how come AC doesn't just reconfigure their aircraft before each flight. So if the flight is overbooked and J is wide open, they can just take some J seats out and put more Y seats in.
I know... stupid idea.