I have 225/50 front and 275/55 rear on stock 7" front and 8" rear.
The rolling diameter is pretty close to the original 185/70 and 215/70 tyres and they look ok.
They are pirelli p-zero front and p7 rear.
I've seen 285s on the 10" rears, and those look good.
But those sizes are hard to find now...