Hmmm... looking at the 3rd pix in the original post, the piston at the far right appears to have the valve pockets rotated 90 degrees from the normal orientation. WTF is up with that? And the valve pockets in the 2nd pix are also not in the right orientation. Sorry, you gotta see what is up there; I'd look underneath and then pull them. Something is definitely not right if I am seeing these pistons correctly.