Thanks for the responses. I do have a compressor. I've had a real hard time with it because the bolts continue to interfere with the control arms and don't allow complete compression, but after fooling around with it a long time I finally got it to work decently.
The crossmember slots definitely need to be extended I believe. They were about half an inch off and we finally got it to go, but like you said I think it's under stress.