Not sure if bushings will make as noticeable difference as installing the Helwig Sway bar package (with polyurethane bushings included).
Also, it's best to install new MOOG end links to connect the anti-sways, as they are much more robust than the stock Ford OEM end links.
Of course, with your highly unique and much desired 6 x 6 drivetrain on your Axis 24.1, you have front leaf springs (vs the E450 stock coil springs).
And those should already greatly assist with the anti-sway.
Correct me if I'm wrong...
'17 Vegas 24.1