John here. Judging *only* by my own truck and limited experience ... I don't think that's a '27 Chevy 1-ton we're looking at. I agree that it could be a GMC of a slightly newer vintage. Again, not sure, but that engine block doesn't look to me like the Chevy 194 (1stGen Stovebolt 6)... but I could be wrong.
The cab looks like the wider all-wood cab. Interesting (to me, anyway) seat details. VERY helpful for me.
What might be your intention for this truck? Original or something modified?
As you read, Peggy and I have taken on a project like that ... A lot of parts, some duplicates, some that don't even go to a truck ...
Just know that you have gotten into a "Long Game" ...

Welcome to the club!!
John