I have done the conversion more times than I care to count honestly! You're going to need a few sets of jack stands - I'd use three sets for that length - and a pair of high-lift jacks. A couple of bottle jacks and some blocks work too. Key is to jack up curbside and roadside evenly, and bring up front and rear incrementally (i.e., don't try to jack all the height needed at once. Normally, I've taken the tongue jack as high as it will lift and then set the front jack stands. Then head to the back and bring it up and set the jack stands. Take the jacks up front, raise, adjust jack stands, and then do the same to the rear. Repeat as needed - and make sure you have enough height for the new height with the axles underslung! Put in additional jack stands when raised and level.
I don't have any pictures as it's just been something I've been doing for many years for friends from the racetrack and fellow campers. I did scan YouTube quick and here's the gist:
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