I do a little surfing on YouTube, the program found this commercial for me. I had looked at some Dusters for sale on it and it found me this commercial from 1969!!
I didn't know they had 14 Cubic "Feet" of truck space! I knew it was huge, but that is HUGE! lol! I think that is only the Valiant though. Duster's are big but I don't think they are that big.
Have fun...
1970 Plymouth Duster, Duster 340 and Valiant Sales Features - Dealer Promo Film - YouTube
