IS SOMETHING WRONG WITH 340 LIFTER BORES

What you're showing in the pictures is quite common and there's nothing wrong with it. The "mold" used to create the sections of the block can get some what sloppy looking, being that they get used over many times. nothing that a grinder can't clean up. Be careful on removing those lifters, try not to gaul up the lifter bores because of the rust and that wiped out lobe on that cam.