Which Sparkplugs for GT40P's?

[Shotgun28]

I talked to the guy I bought the new heads from and he works at a place called Victory Engines , and he said that I should ask for 93 Cobra plugs, does this sound right, just making sure.I am sure he knows what he is talking about, just trying to comfirm before I buy.

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91 LX Convertible Gray on Red B&M Shift improver kit,ASP red alum. underdrive pulleys, Richmond 3.73 gears, 1 5/8 Flowtech long tube Headers and off road h-pipe, Flowmaster 2-chamber cat-back with S.S exhaust, MSD 6A Ignition with coil,Cap and rotor, Taylor Pro wires, K&N 12" conical filter system, Jet stage 2 performance chip and just purchased some GT40P heads, looking at exhaust, Lentech Street Terminator plus on it's way...