5.7 spark plugs???????

OK--This is still a issue with the 5.7 and nitrous---No one will help me out with a colder range spark plug for the application on my 5.7 when using nitrous,If anyone has someone they know that uses nitrous on a 5.7 could you please get the plug number from them??? I use a zex perimeter plate system and last year only sprayed 100 hp shot,This year after my motor re-build I want to spray a 150-200 shot and want to cover all my bases.Zex has no application for plugs witch is weird also ngk say's just use the stock plugs which i believe is wrong,My engine builder was in touch with autolite and they have no application at this time!!!!! HUMMMM very wierd the motor's been on the market for 9 years--Boy who wants to partner with me and make some colder range plugs for the 5.7???? Thanks Steve