How sloped can you be and still level the Monty?

[vipermanden]

I am supposed to be getting my 2017 3820FK Monty in a week or so, and when we bring it home to our house up in Lake Tahoe, our street is sloped 3" for every 48" so the back jacks of the 5th wheel will be lower then the front jacks by how ever many times 4 feet fits into the distance they are apart, times 3". Will I be able to level the Monty using some wood blocks under the rear jacks? I will only be having the 5th wheel in front of our house to prepare for trips. Otherwise it will be stored at a flat storage yard, but that is about 30 miles away. One drawback of living in the mountains? :-( Will I be able to manually lower each set of jacks, to get it close before enabling the auto leveling system?