72 Duster twister with the 275 horse 340 engine?

The dust ball and swirl were a standard 340 stripe features not limited to the Twister package. A Twister has "Twister" written (tape anyway) on the quarter instead of the 340. The point, at least from what I've read, was to put 340 dress on a smaller engine. That's why they are slant six or 318 cars. I can't say the factory would never have put a twister package on a 340, but, at that point, why would you? The 340 already came with, or could get, all of the features that the Twister gave you and had the larger engine.