Can you help me identify these parts?

Hello,
I’m going through some stuff I have here and some of the stuff was given to me awhile ago. I don’t remember the exact application for a few things and was hoping you’d help clear it up.
First are these pushrods. I have several used LA hydraulic flat tappet pushrods picked from different 318s and 360s. They are the ball/ ball design and seem to measure right near 7 1/2”.
I just found a clean set of ball/ball pushrods that measure 6 3/4”.

62DEE39D-069C-45B7-99AD-0483B40560C4.jpeg

775FB90A-3865-4523-94F4-83375DA90AD1.jpeg

Is it possible that the shorter pushrods are for the roller cam 318/360 ? A friend gave me stuff years ago when he went to 1.6 adjustable rocker arms and I wonder if these 6 3/4” pushrods are just what I needed for a build I’m planning.
Secondly, I have a box of these:

C225AC0F-3D52-4335-99F0-FA1F088703D7.jpeg

D0545EC3-1155-4A4C-B2B4-354AA5A7E00E.jpeg

It is self explanatory that they are replacement rocker arms but I don’t know how to tell the difference between LA versions and the B/RB.

268A4B3C-1749-497C-B811-4FD411755DDA.jpeg

C119690F-4760-4F3E-A4F5-59E197377B25.jpeg

I’d appreciate any help you can give.
Thanks!