My first "good" bike was a 1985 Bridgestone 400 and, yes it had 27" (ISO 630) Araya rims, laced to Sansin hubs, 36H, 4X with 14 ga (2.0 mm) no-name plated spokes. The rear hub was 126mm OLD and, of course, threaded for a freewheel.
My rear wheel began breaking spokes after about 8500 miles and after the third broken spoke I replaced both wheels so their durability wasn't that good. I recommend that if you are trying to keep the rims, replace all of the spokes, not just the nipples.
BTW, these are the only wheels I've ever had a break a spoke in over 200,000 miles since but all of the subsequent wheels had Wheelsmith or DT spokes.