You're going to have a ton of poke with that wheel. What size tires were you thinking? OEM wheels are 215/45-18 on a 18x7+55. Going to a 18x10.5+12 is going to bring the wheel out by over 3 inches...
Yeah you will have tons of poke. I've run 10.5's before and I believe I ran a 35et and I had to stretch a 235-width tire to make it work and roll the hell out of the fenders