Well, it's better than the "7.3 Liter Mothra" engine!

Seriously, I don't like "Godzilla" or "Megazilla" either. That's a Japanese thing. The Japanese make some great engines, but the 7.3 should be an American thing.
I have always liked the name Cobrajet, but maybe that is because it has been around so long.
I think something with "Thunder" in it would be good for the 7.3, like the old Thunderjet 429 and the Fairlane Thunderbolt? Thunderclap? No, no, that's no good. Sounds like a bad infection.

I dunno,
pl