sounds about right! I'd call some junk yards and see if there are any wrecked yotas there, as long as the wheel was made out of the same material it should fit. i believe aluminum versus steel has different angles that the stem comes out at. as long as the sensors from the wrecked vehicle...
305 thats wicked wide, I'm running 275/70R17 BF all-terrains and my UCA is VERY close to rubbing the tire, you might need to get spidertraxs or wheels with an offset. as far as size you can probably go to a 55 series if they make it in the tire your looking at!