New to Big Blocks

Murray said
Look at front of block just below the head left side. Are there two threaded holes for mounting accessories

413 said
To use stock 1967 a body mounts and K member it will need these 2 bosses and threaded holes above the oil pump area for the left side mounting bracket. Does it have these bosses

Yep! (It's the little things)

I assume these are not going to work on A Body
Are they desirable for the B - C People?

Pass on left
Drivers on right