Need help ID'ing parts...from BB truck?

[Big Bad 1972 Blazer]

Hey all...thanks to a recent swap meet, among other things, I scored a box of misc trucks parts that the guy said were from a '67 BB Chevy truck. Based on several other parts that I found in the box, that seemed true.

Anyway, since I work primarily on 4x4's, I have no clue as to if the motor mount are from a 67 or 73+ truck. I'm also unsure of the brackets that I found. If I remember correctly, I think that they are frame reinforcements from a 3/4 or 1 ton BB truck. Anyway, any help or info is appreciated!