New guy with Q about Don Estel's ride

[Dustin11]

Hey guys. I am currently restoring my 69 camaro and want to get away from the old look. I'd like to put some 17x9.5's on the rear like Don's car. I have searched but I haven't found what I am looking for. Do you have to mini tub or move anything around like the springs or shocks to get these bigger wheel combo's to fit? Am I better just sticking with an 8 wide wheel?

The car has a factory multi-leaf rear in it.

I have seen Shay Cambpell's ride at the track and have to say it's the baddest camaro I have seen in person.

Thanks