You'd need spacers all the way around if those wheels really are +40mm offset. There are mixed opinions about wheel spacers and I personally wouldn't run spacers bigger than 1/2" with longer studs. Check out Maximum Motorsports website regarding wheel spacers. They believe good quality wheel spacers, when installed correctly, are perfectly safe.
You'd need spacers all the way around if those wheels really are +40mm offset. There are mixed opinions about wheel spacers and I personally wouldn't run spacers bigger than 1/2" with longer studs. Check out Maximum Motorsports website regarding wheel spacers. They believe good quality wheel spacers, when installed correctly, are perfectly safe.