I know this has been asked on more than one occasion....I have a Mark II with the chassis modified to accept larger rear tires (315 tight). Straight 89 axle with 3 link. I want to change wheels to Bullets with 295 to 315 in the rear and 245 or 255 in the front...My question is what back spacing for a 17 inch Bullet rim in the rear. The Mark III's have a wider body so I am guessing that a rim for that has to much back spacing. Thanks for the help....