Head Gasket,Cracked head or hole in piston

Thats some hard luck, Brenton,
Wierd how both pistons broke at the same place like that, what type
of piston are they? [ what brand, cast or forged ]
Do the other pistons have damage like pitting, scarring?
What type of ignition system do you run, type of wires, are the wires
run in a loom with seperators?
What type of fuel, fuel system and induction?
Do you use any power adders.