[Coupe Devil]

Actually Marty ya are wrong. And there are no new weather stripings made for fox body car rear quater windows. The Steeda Products are just covers not new weatherstirpping. And you can cut the glass out of the weather stripping but it wont do you any good. There are several ( 10 or so ) bolts made onto the back of the glass that you must remove the interior side panel to get access to. You will have to drill a few holes in the metal of your 86 but dont worry they will all be hidden. You will have to take the interior panel out of the 90 and remove the nuts that hold the window in. Then do the same for your 86.. mark where the new holes on your 86 will go ( the 90 model window have a few more bolts to hold them on ) and drill the new holes. Install the 90 window and nuts and then install the interior panel back.. But thats not the hard part.. you must also have 87+ style upper door moldings ( that piece that's on the body of the car above the door ) and 87+ style mirrors for all the trim to match up. Its an easy swap if you have all the parts.. And makes for a real good looking car., I hate siderfins but love 4 eyed cars.. i.e. my 86 notch im builing now will have 87+ door trim and rear quater windows.. Need anything else let me know

Bradley