It all depends on how much time you have to make all the body lines perfect. Your building a Jeep. Not a BMW so a 3/16in gap might accure after bashing it through the rocks but then again that gap you started off with could get better after a good trail ride. LOL. Your building a Rock crawler, not a Mall Crawler so Remember that a true off road rig is judged by the scrapes , scratches & dents. Not the perfect body lines. A fresh coat of mud should hide any inperfections. I no you want it to look perfect & if a 3/16in gap is noticed then tell that person that if I drive up onto the hood of your car then the gap will be perfect. LOL