I also agree about the nitrous set-up.....okay big bandwagon...
but a couple of other thoughts, if you are pushing the exhaust gas temps it might be worth a "good" coating on the piston from top ring up. The down side is the ones that are fused to the aluminum on a molecular level add a lot to the cost of the piston. The other thing is choose a combustion chamber shape which also means dome shape that is friendly to the excelerated burn of nitrous/gas combination...lot less tune up problems and fewer damaged pistons.
On that nitrous tune up....while fail safe devices are ok.....attention to detail is better.