New dimensions:From center of wheel to highest point of wheel well. Front drivers side=161/4 pass.side=165/8 Diff. of 3/8--- Rear drivers side=145/8 Pass. side=15" Diff. of 3/8". This may be normal but i would like to add 3/8 shims to the Drivers side front and rear.1.Will this present a problem? 2.How are the shims installed?