Need serious help

[lexgunner30]

I'm new to this site and after reading page after page of websites on google and msn, I'm guessing this site is the one where I'll get the best help.

The two pictures I attached was my Grandpa's farm truck since he bought it in '67. It has a nine foot wood floor dump bed and manual transmission. The title only said it was a 1967 GMC p/u but after doing some research, I gather it's a longhorn model because of the bed length. I took it to a restorer a year and a half ago. He said the frame was just too thin from rust to save. It's gone now regardless whether he was being honest or not.

What I need is some help to know if this style was a limited edition. I can't find any pictures or information about this truck. I have to find another one so I can fix it up. I learned to drive with it on the farm and need to find another one.