Also for what it's worth, i went back to find your photo album.
When looking for parts in case anything ever happens this may be helpful info.
On exterior: your header panel is 1984-1987, front bumper fillers 1984-1987, grille 1984-1986, headlight bezels 1984-1987, tailights 1984-1987. Has been repainted, looks to be a nice job, emblems put back in the wrong spot but correct for year.
On the interior, your gauges and bezel are 1983. However, your interior is 1985-1986 grey limited door panels, and the dashboard has at least been dyed (1983 in a grey car was dark charcoal near black from the factory) but more likely changed. The dash plaque over the glove box is incorrect, that was the dash plaque for a base (non limited) regal in a 1984-1985 style. Probably dash had cracks and was swapped. The seats not really sure what they're from, center console looks grand prix. Shifter knob looks like whats in my 78 z28. Original grey color in that year was what they call sandstone grey, it's much lighter in shade.
So just be aware when asking/buying/ordering parts you need the newer 1985-87 shade, but for plastics that are woodgrain you cannot buy 1987 - it had brushed aluminum for the doors and grey/black on the dash trim... something that other than the 1982 GN was never made for the 1981-1983 style gauges.
Lots of little changes, but, looks nice!
