Sorry for the delay. I had to take these parts off my bike to measure them and couldn't get to it earlier in the week.
Hopefully this is the springer you have.
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And these are the parts you need?
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I calculated the 2.052 dimension by adding half the diameter of each hole to 1.687 reference. But I included the reference dimensions since that is what you asked for.
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The shoulder length is .187 but the rocker plate is .125 and the brass washer is .062, which means that when you bolt everything up tight it is line to line. I noticed that I had some binding in mine, so I added some 1/32" thick shims that basically extend the length of the shoulder by about .030. That is probably a little too much but that was all I had. If I was going to make the shoulder bolt myself, I would probably make the shoulder .200 long instead of .187 just to make sure there would be a little bit of clearance when everything is tightened up.
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I added the little shim to the left to create a little more clearance.
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Hope this helps,
Rusty.