Fiats were always a ***** to do even back when in my day. The rubber installs were good but then they started gluing in. The cheaper bastards put just enough material on the pinchweld to secure it. You couldn't even use a cold knife and piano wire to cut it out. Had to completely cover up the interior and smash the window out and then chisel the rest off. Never ever did those out on the road they always had to come into the shop. Sometimes we would jack the price up so we didn't get the job. Just plain nasty.