Dash top is now recovered and respectable. This wasn’t too bad a job: Remove crash rail, remove defroster vents, remove fiberboard top, remove old material from board (mine fell off from heat damage). Then use contact cement to glue new piece on in two stages (top first, then wrap “extra” around to back on windshield side). Glue strip of foam along windshield on underside, cut holes for vents. Put back in car, bolt vents in, contact-cement the remaining “extra” fabric along dash edge to dash, bolt crash rail back on. (Haven’t got to that last part yet.)