67's and 68's are very close if not the same with a few exceptions... your wheel arch front to back is only 28.5-29", and max width from inner wheel wellto lip is 11",Rolling the lip will get you an extra 1-1.5". How would a 30" tall by 12.5" tire fit without mods ? Not to mention tire growth. I could be wrong...but Good luck.
If you get it to fit, post a pic and tell of any mods.
[ 03-05-2004, 05:07 AM: Message edited by: DOUG G ]