Another episode of " Name This Part "

Hey guys and girls ! I have a couple things I would like to figure out what the heck they are !

First up is
#1
Small Block Mopar Real Race stuff .

Header flanges..




Up #2


I know for SB , But I cant find it anywhere one the NET !



Up #3
What the heck are these from ?




and #4

Maybe from a duster ?



Thanks for any and all Help !