Sorry for the vagueness, I was referring to the 90 degree angle between the shoulder, elbow and back that I've read is kind of the happy medium for more casual road cyclists. My quill stem is at its minimum insertion point, so I can't raise the stem anymore, which is one thing I think would help. Maybe someone with a good eye can see based on this image how my reach is.

Chaadster, to your point, I have read that tightness between the shoulders can be from a too wide stance, but I've also read that trapezius tightness can be as a result of too short of reach.

My quill stem is 110mm, but I'm still not crazy about the long, low reach to the hoods on this older style bar (seems like having the bars turned up actually make my trapezius muscles tighter, that's why I think it's a reach thing, they're less tight with the bars as seen in the photo). So I've got a number of variables that are probably best handled at a shop with an objective set of eyes. But going by basic geometry, I think I need the bars a little higher and my reach slightly extended to get to that 90 degree shoulder angle I referred to earlier