Max tire size on a stock rallye wheel / setup ideas

1968FormulaS340 said
No problems other than decreased tire life, decreased handling and increased chance of failure.

It a 68 charger with the rear end up in the air(no handling like that) Tire life had nothin to do with replacing the after 15 years other than getting alittle hard and checked. It doesnt effect the handling much cause it cant handle anyway.