Any thoughts on how big a wheel / tire can be installed on a 'brier? The stock 195 / 14"'s I have now look plenty tight in the rear, but I have a friend who's added 205/14's, and have been told that 15"'s will fit - must require some offset... Appreciate the input...thx! Rod '64 greenbrier dlx...costing me nickels and dimes!