ok... I work for a major tire manufacturer... here's what I can tell ya...
check the wheel width. We rate those tires for certian wheels for a reason. I'd think a 235/85R16 would fit without interference, but I'm thinking that with a larger diameter than the OE, where you SHOULD at least, reprogram the speedo... it may even cause a driveability problem based on the decreased gear ratio...
a 265/75 is NOT recommended for less than a 7.5" wheel... it pulls the beads too close together, putting too much stress on the tire carcass at the bead area and in the center of the tread/belt package...
it will also most likely rub on the companion tire, leading to sidewall failure...
any of this sound familiar?
On a SRW application, we routinely fit 285's on the stock wheels, and that's about all you can fit on them without rubbing on something...