Hi guys, I have converted my Big block Chev in my sea boat to injection, I converted the distributor to 2X LS cam wheel with LS3 cam sensor and fitted 24X reluctor to the front of the crank with LS1 sensor and fitted a Holly fuel injection intake and throttle body with TPS and IAC and holly fuel rails with LS3 injectors, LS3 coils and MSD leads ,MSD fuel pump and Aeromotive regulator. and 411 computer
Problem is what spark plugs? I like the iridium plugs that I have used in heaps of jet boats with LS engines, the heads on the big block are for washer plugs and currently have Champion N3 any suggestion on what plug to run?

Mike