Well, my hat is off to you on those plans to do some serious touring on the Meteor! How many km/miles would you plan to cover in one day, on average?
I've done many, many years and hundreds of thousands of kilometres of LD touring in my years, all on machines made for the job, some better than others, most notably the Honda ST1100 (Pan over the pond) for the last 27 years of my touring days.
I would never consider doing a LD tour on a 350, with basically zero weather protection, limited carrying capacity, a three to four hour seat tolerance, a small fuel tank, and way insufficient HP to meet the needs of North American roads. I was supremely spoiled on all counts and I am resigned to toodling about country back roads in the local area now.
Good luck on those upcoming adventures!