What all do i need to take to machine shop?

DrCharles said
The ones in the picture (of everything spread out) don't look like BB A-body manifolds to me... but the real thing is going for low four figures (383) and even more for the rare 440 ones.
Are you sure someone actually gave a pair away with a core engine? If so, sell them and you can not only buy headers but some other parts too!

You're correct. The ones on the floor that came off the motor are not the ones in question. The a-body ones are on the shelf.

The third one way down on the bottom shelf is a 273 driver side unit.