I've seen a few people here ask about underbody measurements and how to check of the K-Member etc are square, so I took some prints from the Camaro Factory Service Manual and have posted them here.

I've also included a diagram from someone else here which illustrates where the main measurements are taken from.

Key words to help searching for these diagrams would be:

Third gen Camaro
Underbody measurements
Underbody horizontal and vertical dimensions
Tram gauge
Tram gage
Bent frame
Unibody
align chassis jig
accident damage
floor pan
K-member
K member
cross member
straight

 

Good info to have, thanks for posting!