I'm a big rider with a summer weight of 265, my touring bike weighs 25lb unloaded and I run Dyads with 32h. I'm also using a 13/14 single butted spoke from wheelsmith. If you're really worried about things being strong enough I would discourage using a 30+ year old base model hub. When that was produced rsx(modern Sora) and rx100(modern tiagra) were above it making it Claris level at best and tourney worst case. Not something great to spend good money rebuilding.
I'd go minimum 105 if road spaced, space your frame to 130 if steel and currently 126, and lx if 135 spacing. If you like classic stuff the buy nos, 30+ yo new mid-range stuff will still be decent. 30yo used lower end stuff won't be.