iv just dropped my 17x7.5 et40 MO's on my car, complete with rear disc conversion, and the rears arent scrubbing, altho my new arches were rolled completely back on themselves. fronts are like twins', completely untouched

only thing i will suggest is u drop from the 45 profile to the 40 profile, as that wnt help with clearance at all

and yes, et35 sits 2mm further out from the hub than et37, much like ur et37 sits 3mm further from the hub than my et40