77royalsierra

my grandpa has a 1977 gmc royal sierra in pretty bad condition. it's a 3 speed auto, had a/c at one time, and has manual windows and locks. it's got the wood grain accent on the dash and badges on the fenders. it's brown with a tan center strip. it's got rust all over, and the transmission drinks fluid. it's hard to start and the transmission doesn't like to shift. that said, it's still plated and he uses it to haul loads of dirt and manure to his farm. i had no idea it was so rare until i tried to search it. no results came up except this, where i come to find out that only 500 were made!