If it's the same as my Rambler (eg. old-fashioned pedal that hinges on the floor, and the top pushes on a lever attached to the firewall) then it doesn't use screws; there's a "C" shaped spring clip that fits across the back, it looks like this:<snip>
Thanks! That explains it. I did see that spring clip but it didn't register. So, you can just pull it back on each end and it should release, yes?
I don't exactly recall... but something like, hook the hump-end in, align the drivers-door side, insert other end. You could probably just bend one up from springy wire.
Back to the Home of the AMC Gremlin