1970-72 K20 Frame Dimensions

[Cole Pete]

I have recently purchased a group of project trucks. Among the items I bought include a k20 frame that was hit in the side and is slightly tweaked. I'm wondering if anyone has frame measurements/dimensions for a 1970-72 K20 frame? I'm currently in an auto collision program at a tech college in WI and my Instructor is thinking about letting me use my bent frame on the schools frame rack. I would like to find some dimensions to go off of while I straighten it to make it easier and precise. I've been searching the internet and haven't found what I'm looking for yet so I thought I would check on this website. If anyone could help me out and lead me in the right direction it would be much appreciated.
Thanks!