I wanted to get it right the first time that's for sure! I'm running the GTS coil over kit up front with a wilwood 12.88 6 piston brake kit, no spacers. I was shocked when I got exactly a 6.75 spacing and not something odd ball. I haven't measured my overall track width but I have the GTS LCAs out 4 complete turns so I could be narrower if needed. I'm honestly getting a near stock or greater turn radius. I have room to spare tire clearance wise against my frame lock to lock. Tire height was more of an issue than width for me. I'm not sure how a 275/35/18 would have ended up but you may want to look into a 285/30 yourself.
It's been hilarious driving around with just a 245 out back and 285s up front. I'm very much looking forward to getting 285s in all four corners.
