Okay, I'm a little confused here. Those upper control arms look to be connected to an existing fron crossmember of some kind, and that engine isn't hanging in mid air. Why can't you use that? Further, this is a unibody car if I remember correctly, and there should be box sections that that front member attaches to that probably run back at least under the firewall/floor boards. Couldn't you build a tubular crossmember that would span those, perhaps with some reinforcement to eliminate the chance of twist?