If the Skyhawk is the guitar with a red finish, I don't think it's mahogany. It would be easier to tell if you posted a higher resolution shot, though. I believe mahogany was out of production by '84. Fred Finisher made a comment in one of his posts about being there when the remaining mahogany stock went away, and IIRC he left the shop around '84.
The mahogany used on early G&Ls is quite a bit darker than the current Equatorial Mahogany. Here's a shot of my '81 F-100's mahogany neck pocket:
The flash brightened it up quite a bit. In real life, it's significantly darker.
My color vision isn't the best, but it looks to me like your neck pocket and neck heel shots show about the same shade. Maple would be a much more likely candidate by 1983. Unlike the lightweight maple bodies found on many first-style SC-series guitars, full-size maple instruments (like 'Hawks or ASATs) could be quite heavy. I haven't weighed them yet, but I'm guessing some of mine are up around nine pounds.
Here's the neck pocket on my maple Nighthawk, which is also from August '83:
I hope this helps. Please post a closer-up photo of your Skyhawk's neck pocket.
Ken