It looks good to me. The frame of your car is really light in the front, and the crossmember really doesn't add all that much weight. Once you start dropping in the engine, transmission, and all the front sheetmetal, the suspension will settle in. You'll want to use the jackscrews (the top coil spring mounts) to set your ride height. Ideally, you'll have the lower control arm parallel to the ground for the best handling and ride quality.
It does look, in the second pic, that your lower control arm hardware isn't installed completely. It looks like the two fasteners outboard of the lower end of the coil spring are not fully pressed into the hole. Did you do this as part of your mockup? Just asking questions for when I get around to getting my front MII suspension for my '48 Chevy.