should I revive my 1980s Dawes SuperGalaxy?

[brrapp]

In the early eighties I was a keen cyclist, a bit of road racing and cycle touring at weekends. I regularly did 100 mile days and at least once did a 200 mile day. I did over 7000 miles in 1982 while I was a student then when I got my first real wage in 1983 I splashed out on a shiny new Dawes SuperGalaxy. Unfortunately along with the first decent wage there was also a job which took up most of my time and I hardly got out on the bike even though I loved it. Eventually I stuck it in my sister's attic and left it there until I had more time.
Last night my sister gave me a call, she's moving home and just found my old bike in her attic, 'do I want it it back?'
It's a 1983 Dawes SuperGalaxy (bought from Dales in Glasgow)24" frames, Brookes leather saddle etc, probably did less than 500 miles over the summer of '83 before it was put away.
I'm now in my 50's, no longer do road cycling though I do about 5 miles a day and 20 at the weekend on forestry roads as part of recuperation from a knee injury. I'm around 20 stone now (was 18 stone back in '83)but not too much fat.
Will the old bike handle me getting back on the road again or would I be as well scrapping it and the idea of getting back on it? If getting back on it, what parts do I need to change and what do I need to look out for giving me problems (apart from my old body)?

[brrapp]

Thanks both, I haven't seen it since 1983 so didn't know what sort of condition it's in. My sister lives about 150 miles from me so I'll have to wait till the weekend to get a look. I told her not to chuck it out in the meantime and she said that she wouldn't have because it still looks like brand new. I'm looking forwards to seeing again now. I know it was a good bike at the time, I can't remember what it cost but know it was about 3 times what my previous bike had been.