Here are pics of the dresses.
After measuring my girls, I made a size 7 top, with the length of size 8, but the bodice was too big. When will I learn that New Look patterns seem to run big, especially for my skinny minnys? :). The instructions for adding the bias tape at the armholes was clear as mud (and I still think they're drawing was wrong) but I did manage to figure it out. If anyone is interested, I took pictures of the process in case I needed it later :)
The instructions for inserting the lapped zipper sucked, but I did find an excellent tutorial online. In the future, I think I'll just stick to invisible zips.