dish pistons?

my 2.2 has dish pistons. does any body know of a year that has flat top pistons?

All the 2.2 L from GM have the "dish". If you want the flat top to raise your compression which is what I think your trying to do, look for a cheap set of hypereutectic pistons from Howell automotive or summit, or jegs. But make sure you measure correctly the size you need.