You can juggle those Heim joint spacers, cut them down, use washers to compensate, etc. to get more clearance. I bought some thin, precision washers from McMaster-Carr and I now have a lathe.
Note post #88. I have moved my trailing arm inside by making aluminum bushings and at the front I will move it fully inboard or I will cut the mounts out and by re-positioning, gain more room. One of the reasons I bought a bare frame.
I'm almost that close with my (equivalent) 10.5 inch 18" rims with 28 ET. I still have to move out my uprights, or get shorter axles, as the axles are in too tight in the CV joint. If I move everything out I will need three longer arms per side and rims with more inward offset to allow fender to wheel clearance. A barrel o' snakes! I suspect I will get shorter axles or look on Ebay for front STi axles.