high back buckets

[75gmc454]

I was in the junkyard today looking for an original console for my 73 gmc. I have seen many consoles on ebay with the chevy bowtie, but a GMC is hard to find.

Well I was walking along looking in trucks and there sat this one ton sierra grande. I could see the high buckets through the windshield, I just thought they were added later. But they are original high back buckets with the console with the gmc, but it has the round cup holders and not the seat belt holders like mine should have. This truck must be about a 78 model with a 4 speed trans and a 350, but it has most all options.

I knew they put high back buckets in these trucks after 76 I believe, this was just the first I have seen. The guy at the junkyard thought they were added, but I know better, the truck even had the carpet all the way up behind the seats. Has anyone else seen the highbacks in an original truck? I would think a truck like that would be fairly rare.