Lots of parts! Need help IDing them

No vin on the block its blank. And the 340 is .20 over on the tag. The other block is a standard 360 and I didn't move the blocks out to look for a vin on it. The heads are a set of j heads and 360 head. One lone x head and lone 360 also.

Do the the 360 heads come stamped with a 360 on them?

Help I'd more parts, I don't know what the flywheel thing is?