[chuckies76ta]

Dam, That's not good. There is one thing in my opinion about these uni-body cars. Never support that front end like you did off the front sway bar. I puts alot of stress on the center of the car. You also have an IA2 block which is very heavy. At a minimum use stands under the lower control arms. I have wooden blocks made for the purpose. Also, never put blocks at the front off the front frame when it attaches to the body as the front end is way too heavy and will cause a lot of flexing. Sorry to see that happen to you.
Like mentioned tie the front frame to the rear leaf spring perch or the frame rails. I have Hotchkis on my 76 and Global-west on the 72 Firebird. The 72 also has the solid frame mounts.