66' Duster with a 340 Hemi? LMAO!

i got into a argument when i had my 72 twister once a guy told me he had one just like it except,...... it was the duster demon sport package and it was red not brown and it too had the mysterious 383 hemi with the six pack exhaust?! i told him yeah thats cool sounds just about like mine except mine aint full of chit ,......im still trying to figure out the six pack exhaust thingy