The short stacks are 1" long (one has some slight damage. Dented and smoothed out some.)
The medium ones are 2 1/4" long.
The long ones are 4" long.
I believe, due to the construction and nickle plate, that these are Web stacks, as Frank mentioned the Dels were die-cast. My friend says the stacks were interchangeable between certain DOWN-DRAFTS; they certainly won't fit on my beloved DCOE side-drafts.
As far as chokes, there are 2-30mm, that may fit your carbs: they are 41.6mm OD, and 34.7mm long.
There are a bunch of main jets, but in pairs of sizes. No four in the same size.
There are four matching idle jets (45), and four matching accel jets, but I don't know if they fit Dels or Webs.