I just took off my Z28 GFX and broke two pieces. The first is the rectangle aluminum piece that has 2 bolts at each end. It is the part that connects the chin lip spoiler to the fender, one of the bolts snapped off during removal. The second piece is the two small white plastic circles that have a half rectangle cutout in them. The go on two metal studs on the rear quarter panel where the back of the lower spoiler attaches. This is an 84, so the rear GFX spoiler slides on with two metal "hooks" that go over the plastic circles and keep it on. I have no clue where to find these parts!! Thanks.

 

Fabricate them.

 

Ebay or the JY, but the plastic pieces are kinda hard to find.