Unknown brackets and pulleys

[bobs409]

Found these in a school bus at a junkyard that had mostly Chevy parts in it. These brackets and pulleys don't have any numbers on them except the 3rd one below. It's hard to read but looks like 3854060. (the 8 and last 0 may not be correct)

See if you can identify any of these:

 

[58 Apache]

I've been workin on a 58 curb side delivery van with brackets like pics 1 and 2 and I seen pic 4 before it should come to me and I'll post later.

 

[Brian Thompson]

The second one looks like it is an upper generator brace for a 6 cyl. or it could be the rear a/c brace, the third and fourth brackets are part of a small block A/C bracket