when you say seal, do you mean so you can use it as a hatch to open and close, or just to graft in and close off the rear after chopping the top?
if you just want to chop the top, sure it'll fit. just need to trim the bottom outside edges a little bit so it sits level with the roof line.
if you want to actually mount it so it opens i don't think so, for a few reasons.
1. the 97+ hatch is about wider, so the body lines will look goofy as hell
2. the seal surface is different. see pics below
this is the seal surface for a 97+ hatch
this is the seal surface for a 96- hatch
there is about 1/2in difference in depth from the seal surface to the outter edge as well, where the 97+ hatch is deeper than the 96-
3. the hinge mount pattern is totally different 97+ is about 28 5/8 inside hinge to inside hinge, where the 96- is about 34in. i could have those numbers backwards. either way the aren't the same
4. the hinges are totally different aswell
96- hinge next to 97+ hatch where hinge should bolt to
hope that helps