These LTs have been recommended in the past as suitable for a Monty and you've had them before too. Just make sure they meet the weight rating for your rig (6,000 lb axles means 3,000 lb for the tire and 7,000 lb axles means 3,500 for the tire). The tire tech is supposed to check this but you should check for yourself - hopefully you get some margin, too. I almost got some lesser rated tires on my TV when the tire tech tried to sell me something less expensive so watch the ratings, fortunately I caught it and we went for suitable tires. And do find the date code - the tire tech better know how to read this and show you or you better go find another tire store.
Do you know how to find the date code? If not, here's a link:
http://www.tirerack.com/tires/tirete....jsp?techid=11. If you still need help, please ASK!!! The MOC is very good at answering especially about this.