[Mart]

I'd suggest to just give it a try tubeless with the wheels as they are and monitor the pressures. If you find you are slowly losing pressure then look at adding something. Any air loss will be gradual and not sudden. Is the tyre damaged, or can it be used again?

I ran tubeless radials on my 58 GMC successfully. The only problem I had was on the fronts when they had tubes in. The tubes get abraded by the tyres as they flex.