Crank is a campag Victory (or Triomphe, can't remember which) on a Sugino BB. I have owned this bike since the early 70's and had converted to a Sugino back then...however I moved the pieces to a custom frame about 1975 and put the original cups back in. The spindle fits the stock cups so there was no issue when I got a new/used crank a couple of years back.

Front derailleur is a Sun Tour SL (back in the day I used a Comp V, but I like the SL better as its all alloy); rear is a Simplex SX100 (prestige follow on - cheap at Velo Orange) which shifts great. Also have a Suntour V that I put on once in a while - I like the alloy but it somehow looks a bit large so I'm using the simplex for now - swapping takes maybe 15 minutes on a bad day....

Hubs are Shimano 600 and were mounted on wheels which I bought used....no issue fitting even though the rear is a 6 speed. Front fits no problem, I did not need to cold set the rear but I do fiddle a bit getting the back wheel in....no real issue though. I've also swapped in wheels from both my Trek and my wife's Norco (both also 6 speed) with no issue so I don't think you will have problems finding wheels to fit yours.

Mark