wheels and tire combination

[3li9]

hi
i am loking to change my wheels and tires but i don t know if it fits and if it will look good.
actually i have 15x8 wheels one it with 275/60 allround. i want the 70`look and the front tyres smaler then the back tyres.
i ll take cragar ss wheels in 15 inch. the problem is the wide of the wheels what should i take 7 8 or 10 inch?

the tyres i will put on are cooper cobra radial in 235/60 in the front and 275/60 or maybe 255/70 in the rear what do you think?
which wheelwide with wich tyres?

i read a lot about but found nothing i accept. there are shops who talk abut maximum wide for the 275/60r15 is 8.5 inch the most are driving them with 15x10 wheels so i want to know your opinin or maybe a few pics that i could see the difference?

thx a lot