This is one area where I will (sometimes) turn heretic and suggest going with the modern over the classic/vintage. If you really have enough steering column to cut off all the threading and still have clamping area for a threadless stem, and it's an '87 frame, I'd do it. The "aheadset" style headset and stem really is an improved design, both in ease of adjustment and longevity, though I'd opt for a "classic" looking threadless HS and a stem with a -17 degree angle.