Either you "missed" on matching the head to the piston or someone has been in there since the valve strike, those valves don't appear to have hit that piston. Sure you didn't flip something and take a picture of the wrong chamber on the head?
It is hard to say.... the valves may well be bent and we can't see it with that shot. No matter; it comes all apart.
The left hand rocker in that pix of the rockers looks really chewed on the left edge. And boy, yeah, those keepers look down deep. Wrong retainers? I've never had ones with the - offset so cannot say on that possibility.
Not to be discouraging, but be ready for a boatload of new parts OP. This looks to have been thrown together with whatever was laying around.
