Butterick 4919: altered bodice + fabric choices

I added some side darts to the bodice and made a tuck on each side of the neckline, which I have just stitched as darts for now to get the idea. I then turned under and stitched down the seam allowance along the neckline (in the actual dress, the edges are finished by a facing piece that is sewn like a lining). I threw a couple of hooks on the back so I could get it to stay on. I think the fit is much better now. I might also add a little more length to the shoulder seams so my bra straps don't show.

I'm sorry this picture is so blurry, but it's the best I could get by myself. You can kind of see the tucks I made at the neckline near the center front. (Any advice on how to alter the pattern for this?)

(If I had more shame, I would not post this  picture of me in my baggy pants and messy living room on the internet, but I guess I don't.)

Here are the two fabrics I'm thinking about. The top one is a cotton voile with a black background; the bottom a black woven polyester. The coin on the black fabric is a quarter.

Fabric & Pattern

Looking through my stash I found this cotton/lycra, very drapy, dark blue denim. Do you think I could use it to make my princess seam vintage 60's dress?  It's very lightweight, it drapes beautifully, my only concern is that the pattern takes approximately 2.5m of fabric and I have 2m.  Perhaps I will need to take a trip to my nearest thrift store.  In Australia we call thrift stores, second-hand shops. They mean the same thing.

My pattern finally came too!  I'm not sure if the stamped envelope is the actual cover of the pattern or not.  The previous owner had sticky-taped a cut-out of the dress on the envelope itself but I can't see where the picture came from.  It's not cut out of the instructions.  She has even written on the envelope that the short sleeve dress takes 2 & 5/8 yards of fabric, 60" wide.  I love holding that piece of history in my hands and wondering what her dress looked like, did she like it, what kind of fabric she used and where she wore it.