72 Duster twister with the 275 horse 340 engine?

I understand the 'Twister theme' - paint-on performance, nothing else.

But what did I have to order in 1972, if I had bought a Duster 340 and wanted the Twister-hood treatment?

I've seen a lot of 72 Dusters 340 with this hood, but no idea if they had it out of the showroom...

https://ccco.s3.amazonaws.com/kb_photos/123/968_10_low_res.jpeg