Anyone out there have a 77 GMC Sierra 3+3 pickup?

[77GMCCrewcabowner]

I just recently bought a 77 GMC Sierra 3+3 truck. I have been checking around on the internet trying to find other ones out there because I have not seen any others like it on the road. I called the GMC dealer here in Bellingham, WA and they checked around and called me back and asked if I was sure it was not a 78 model. The manufacture date on the truck is January of 1977 so I am SURE it is a 77 model. I was wondering if anyone on here has one or know of anyone who has one. I am in the process of fixing her up and want to put her in some classic truck shows but I would like to get a little more info on her before I do. .

Any and all information would be greatly appreciated.