8R19.5 rims / tires were an option on the TF 1 tons. If they were an option on AD's then I suspect the tires would fit, as they do on my 58 3800.
You may have a hard time finding original 19.5 rims, and newer ones may require installation of larger studs in your hub. Newer rims would allow you to use some of the newer, lower profile 19.5 tires that are available though.
