Diminshed Value

[kansasc10]

Hi all,
I was recently rear ended while sitting at a red light and have some damage to my 72 longbed. Im writing to get opinions on how much (if any) that my trucks value will be diminished now that its been in a wreck even after it gets fixed. Pictures of the damage are included. Unfortunately there isnt any accident data on a truck like this that I can find like there would be on newer Chevy truck. Id like to take what you guys have to say, find a median and/or average value and figure out if its worth pursuing a diminished value claim or not and what that figure looks like. I figured this is as good of a place as any to start. Thanks in advance for your thoughts.