64 cuda sheet metal assembly

Yes those wedges are there (1 per side between the frame rail and floor pan. They are close cell foam. very durable. I cut new ones from closed cell, hi density packing materials taken from recovered computer shipping boxes. the stuff is virtually the same!

Those 2 strips in the OP look nothing like the wedges....I don't think the strips are the same thing. I have no idea where those go.