165r's for the front.
i would go with for a 265/60/15 on a 15x8.5 wheel. (should be about 27 1/2 diameter rear)
this will keep the front skinny/rear biggie look going.
if you don't get drag radials or et streets for skinnies and biggies, well, i don't know what to say.
bfg drag radials are premo but won't last as long as the nitto dr's. m/t is still delaying their dr series. :-/