Good 408 combo?

If you do run dished pistons, I recommend the step dish type. They have a step that fills part of the combustion chamber on open chamber heads. If you ever swap to closed chamber heads, you'll have to get the step milled down for piston/head clearance. But, if you plan on going to closed chamber heads, then go with either flat top or regular dished pistons to save the cost and labor of milling the step pistons.