You don’t even want to know what I’d do. Most people dont like to hear it. But I’d throw any plug in it that sparks and read the tune up then decide if I needed to go colder or hotter, richer or leaner. There is (in my opinion) zero reason to try to guess at a what plug will be optimal without a baseline. Stick what the cylinder head manufacturer recommends in it and BEGIN tuning.
And it would definitely be an NGK.
And that's the answer I was expecting to hear. Hey, you got to start somewhere! As well as determining if it would be optimized with a standard tip or a projection tip during the tuning by the plug readings. And yeah, NGK all the way.
