My Bianchi came with Cyclone cranks. They're nothing special but they work just fine. Probably boat anchors, though I haven't pulled mine off to check. If I were going to spend actual money on cranks I'd spend a couple bucks more and get something better (i.e., lighter).
Shimano, or Suntour? Suntour Cyclone was a fairly nice road gruppo from the early 80s. If I remember correctly, it was second in their lineup after Superbe, the racing gruppo. There is a NOS chainset on ebay right now, likely to go cheap.