Flyer, I believe that new starters have been trained on the 767 longhaul plane this year. However, your start date (if you get the job) will now be quite late in the season so I reckon you will just be trained on short haul.
FCA is a wonderful company to work for and as crew you are treated very well! Our flight duty pay has just been increased so on shorthaul you now earn £2.71 for every hour you are flying. During our busy summer months you will be able to live easily off of your monthly wages, so don't worry about that!
Good luck at your interview!