Keeping parameters with edit in place

Okay. Well, here's the deal. I have some blocks that I want to use to make a drawing. In the attached dwg, there are a few blocks inserted, and a shape made from those blocks.

As they stand, I can send the dimensions of each block into an excel spreadsheet or into a table. However, as you can see, if I want to make that triangle look like a triangle, I need to edit the blocks themselves. I'd like to edit each block in place (even though I'll have to create a new block for the edited version, that's okay), and still be able to reference the length of each block in excel.

If possible, I'd also like to figure out how to reference the angle into excel, so that when I look at the excel table, it tells me that I need that piece of material, cut to that length, with that angle.

What do YOU think? I'm at a loss........File006.dwg