Digging through my AMT '65 Grand Prix, looking for tires that might work for the wheels that came with the '29, I picked some that at least initially looked great and fit like a glove.
Two problems though, the whitewall side that I think I'd have preferred, has the whitewalls printed asymmetrically, making this side utterly worthless. (This is common with every single tire in this kit, though some are somewhat slightly better than others, but still all very Three Stooges like.)
The second problem, and perhaps the worst of the two, is that the blackwall side, is larger in diameter than the whitewall side, making all of the tires that came with the GP, utterly and completely useless. Looks like I'll keep digging for more tires.