Thanks for chiming in guys.

Since my spacing is already 126mm, I'm just going to cold set it to give me more options.
So, I literally need everything and just want to make sure I get the right parts. I know I need an Italian threaded BB but still not sure if the headset needs to be Italian or English threaded - anyone? I wouldn't mind going with some older 8-speed Shimano 600 or Campy or even a mix. I plan to use this bike a lot and want to take my time in finding the right parts.