Hi and thanks for the great library link!
I've heard of 7.35x14, E78x14, F70x14, E60x15, F60x15 and G60x15 so far and I'm trying to find sources capable to confirm that. Or some documentation telling what maximum wheel/tire size could be ordered for a 'cuda/Barracuda back in seventies.
Other question would be how the sizes can be converted to eurometric system to keep the correct appearence.