Bent Frame?

[SSLance]

You don't have to put it on a frame machine to see if it's bent, if you can get the center portion (rocker panels) true and level on jackstands,then do some careful measuring to the floor at different points on both side that will let you know if it is bent up or down. Then cross measuring will help you discern if it's bent in or out and on either side. If it is out of spec, it's not necessarily a death blow...depending on how much it is bent it can either be adjusted for or put on a machine and straightened.