Originally Posted by cobalt327
BTW, the second piston above isn't a SBC piston. Post #17 describers the SP 423 pistons- round, 4 valve relief.
I think the Summit site was showing the wrong picture. Upon googling the part number I found this picture which might be a more correct photo: Quench area looks much better in my opinion.
This picture was found at this link, but doesn't match the 4 valve relief description either:
I'm wondering with a 10cc dish, if this picture could be right with the valve reliefs taking up most of the volume. The picture shows a flat top in the quench area, but only 2 valve reliefs.