fold down rear set ...to non fold down???

I went the other way with mine, converted a non-fold down seat car to a fold down seat. I left the package tray without the giant cut out though, so I could keep my speakers.

You’d have to weld or maybe bolt in some kind of brace straight across where the package tray scoops in so that you’d have something to mount the seat to. You could likely leave most of the other brackets and bracing intact, it would all be behind the seat anyway.

You can see what I did to convert my car, is should give you some ideas as to what you’d need to add to get the seat mounted.

How To: Fold down seat conversion