Don't recognize the top (black) piece. Looks like it may be some sort of header panel with cutouts for convertible latches, but not b body.

Next group looks like window channel fuzzies, window sweeps.

Don't recognize the final group, though they bare slight resemblance to the alum piece that attaches to rear of cross brace, to hold well cover.

Here's another pic of the cross brace, I believe it's a single piece, not welded. The holes are reliefs for attaching the alum piece.