Yeah, they're running V8's. I think 2 of them are running 383's with big shots of nitrous. There's also a guy with a Skyline engine that's been getting faster too.
But I'm not brand-loyal, I'll chose whatever tool is most effective for the task at hand. If I were aiming for 9's in a car, I'd have no intention of surprising everyone with the fact that I almost made it using a smaller engine. I'd feel better knowing that I did achieve my goal using a bigger engine.