Kinda got the 346 iron heads ready for the KB251 pistons. Flat chamber depths were from .084"-.102" and they are all now .110". The quench pad on the pistons are .260" tall and we'll have to mill about 1/2 that off or rather some .125" with the preliminary measurements. Cody and I are having some fun with this engine. Just went and bought the 251's because they were the cheapest stroker piston I could buy. We'll be using rebuilt stock 6.358" 400 rods. They are of course just a teeny bit shorter now.