468Blazer

I have searched and can't find the website so thought someone on here would know. I'm looking at a set of 17" Torque thrust II wheels that are 9.5 wide. These wheels came off of a impala ss and have the 5x5 wheel pattern but I know there was set to use if you were going to lower it and a set not to use. I'm looking to lower my truck either 3/4 or 4/6 but didn't know if I should stick with the 17x8 or if the 17x9.5 would be ok? I just don't want the wheel to stick out at all from wheelwell. Any info would greatly be appreciated.
Travis