440 pistons

We will assume its going over by .030,so its a .030 over 440 piston or a stock 400 unit.You want to build a flat top motor and have it deck to zero deck height,and adjust compression with heads gasket thickness.The KB pistons or ICON pistons are a good choice.With the icon pistons,you can get a forged unit for a few bucks more and do what ever you want later in the build,the choice is yours,mrmopartech