I've had problems with newer NOS fenders. If they don't have the old aqua/white GM part sticker, I stay away.SOME repro are better than newer NOS ones. CDL is the best repro fender I have found.I have a CDL on my RH side and it litteraly lined up with just a few shims at the top of the cowl. You shouldn't have to cram in shims. There's something wrong with the fenders