More for conversation than anything groundbreakingly of interest. I'm referring to the strengthening bar that rivets behind the main cluster area of dashtop edge.
I've always seen it in diagrams, never really noticed it otherwise as not a common photo angle to be shown. It appears in all years of documents, at least the 1970 and 1980 Assembly Manuals and both 67-76, 76-81 Parts Manuals, even though it appears more like a later revision to aid in sagging dash sections years later. I checked a few of my saved pics, can't make it out, perhaps painted and blend in, whereas the pic below has been clearly added after paint and stands out.
My own vehicle, modified to RHD, doesn't have it. I haven't inspected why, perhaps not required and they used those tabs for extra mounting points once removed.
Any thoughts, perhaps to aid in all the weight of the dash and instrument panel in that area, but perhaps moreso during assembly when less support or components removed below for periods of time? Would have thought a simple strap type bracket that forms to the dashtop and onto firewall would offer more support, this riveted piece tends to only keep that area straight, but not from sagging. Perhaps it is because they have almost skipped a locating point above the steering column, or perhaps these were assembled with all gauges already in dash and limited access when hung?
Firebird dash cowl diagram by
Ben, on Flickr
Firebird dash strengthening support 483225 by
Ben, on Flickr