Speedpro H405 pistons, what to expect for performance?

Lee,don't sweat it.The comp,works to 8.5 to 8.8 real world.Been around,a very similar build. The pistons survived 3 re rings( lots of N20....!)I would keep the pistons,go thin head gasket. Milling .030,040,would obviouslg help.Toss the cam,spend money on a small,quick ramp hi lift ,hydraulic.Somewhere around a 262,268 Comp.