I have a 77 elky classic with a plain jane dash, [speedo and idiot lights only], I want to change it over to a dash that has tach and guages, does anyone know what would fit and work, also it is auto with column shift. Maybe a dash from a laguna or something?

Can't speak about a 77. Swapping the Malibu sweep dash out for a 70 SS type was labor intensive but it was a direct swap with some wiring harness connector doctoring. 77 could be another story.