On a 2nd Gen,usually it's the rear seat belt mount on the trans hump that needs massaging.I have a 5.75" b/s on my 18x10's w/275/40 rubber and this fits both the '70Z and my '70 SS454 perfectly.
Who are you buying your wheels from?Jon @
www.driverzinc.com sells a ton of Foose wheels and is an expert on fitment,why not ask him to be sure.
