86 could still be considered the tailmost end of Campagnolo transitioning out of the SR era. Can't go wrong with SR/mid 80's frame build! Delta/C Record is pretty much late 87+ timeline the earliest.. it would have been the first Gruppo update for the bike, but frankly, the functionality (under developed indexing and iffy brake performance, plus the weight gain, compared to SR) of the later gruppo might dissapoint.