fitting 285/75-16 bfg mts

got a set of these big chaps fitted to 7x16 weller 8 spokes,

i have a 2"lift kit already,fitted them on and took off front valance cut back sill guard abit,need to camel cut the rear arch,was wondering if i will need to alter anything else,been out for a drive only catching on rear arch(not cut at mo) and rubs abit on full lock on a disco1

I intend to get the same size in cooper discovery stt's on my rrc. Im using 235/85 16's at the mo with 40mm lift and 30mm wheel spacers cut the arches out and put 2" flexi arches without problems. The next step i think is heavy duty steering arms and a 2" body lift to make sure of clearance,could put 2" spacers under the springs but then its caster correction radius(qt)arms and aint got the money.