Track width

[NYBugman1972]

I'm pretty darn sure aluminum trailing arms widen the track by 1" per side, so you only get 2" total +/-, which evens the rear track with the front. 3" on each side is massive and you'd need some really wide fenders to cover them, and then you'd mount the wheels, so you'd be sticking out maybe 5-6" more than stock overall, depending on wheel offset and width.

I don't think you'll have problems, as the aluminum arms are a popular setup. Personally, I run stock trailing arms with a 1" spacer with 17X8.5" with a 245-45-17 tire and there have been no problems.