The Roadmaster Comfort Ride shock kit part # RM-2460 that you referenced would work really well in your 2019 Phoenix Shasta 370FE. As far as improving the ride quality of a trailer these shock kits do the best job so this would be what I would recommend highly. view full answer...
Since the Blue Ox 2-Point Weight Distribution w/ Sway Control # BLU82XR doesn't have a friction sway control bar you can back up without removing the spring bars.
With that being said, spring bars do limit the amount of turning clearance for a towing rig so you might end up having to remove the bars anyways just so you can maneuver your trailer properly. view full answer...