how to get rotation and insertion pt from a block using LISP?

I need to find and check the insertion point and the rotation, in
degrees, of a set of blocks in a drawing. The idea is to update the
block with one of the same name that has a different insertion point.I
need the block to occupy the same location as the previous one. The
previous black has an offset insertion point and the new one is in the
center of the block.  Any ideas?  Thanks, Joe