They are special (ie longer) can get them at Fleetpride, northern tool etc. And if you are mounting truck tires you will have to have a Cheeta (red air tank in pic) to seat the bead unless its a Micheline tire.
Now if anyone is goin to try and mount their own truck tires, I have to say at least watch some online training videos, I know michelins site has them, mounting truck tires or any other tire is very dangerous, but especially truck tires due to the volume and psi of the air and that you will be airing it up outside of a tire cage. Youtube a video of a zipper tear.
Sorry for the spill, BTW love the bus Bruiser