[streetstar]

You can narrow the rear end housing only 2" per side and this will give you enough room to tuck 15 x 12's and a pretty serious tire with the stock trailing arm setup --- (which from a performance standpoint, is sufficient to hook up a lot of horsepower) 15x12 with a 16" M/T tire (not a slick-they are measured different) is about the minimum to give you a true "Pro Street" appearance too

Anything more radical than that and it might be better to ladder bar or 4-link it