Edelbrock heads on a 340 with KB243 pistons

Before you measure the pistons, you might want to measure the rods. After having mine resized, there was quite a bit of variation. My KB107s were so close it was hard to measure and variation.
Also, after a line-hone,and square decking,plus a crank clean-up,and rod resize, it took me all morning to get everything together with a deck-height variance within about .003 .. This would be no big deal with a fat gasket; but I wanted to run the .028 ..