Chucking camber on the rear will be fine for towing I'm not going silly amounts just a noticeable amount , and dropping it will be fine , I will only use it once a month or there abouts for towing , track days etc , so it isnt making it un useable and it's had a full de cat re map induction and a 16g turbo slapped on it , not sure about the injectors need to pop one out to see if they have been up graded , oh and a walbro fuel pump , and the v70 is yes basically a newer 850 so I'm led to believe , brakes seem fine with the power to , don't know what pads it's running or any other mods , will be chucking it on the rollers soon as it needs a health check and good once over standard there 250 the r v70 is 260 standard I'm fairly new to them myself so it's all s learning curve