Hanslo

Is the spring perch on the Eibachs smaller than on the stock GT springs? The reason I ask is I wanted to get a set of specB rims for my GT but apparently I would have to stick with the stock 215/45 tire size since 225/45's would rub on my stock spring perch. Does anyone know if I could fit 225/45's on specB rims with the Eibach-spring/stock-strut combo? I know that I can fit wider tires if I decrease the tire profile but I am actually interested in increasing the tire profile a tiny bit. Thanks, Hanslo