1968 Barracuda 383 Big Block torque boxes ?????

I have a friend in Warner Robins, Georgia with an original 67 Hemi auto Charger. Well known local car and very well documented. It does not have torque boxes........well at least it did not come with them. Last I heard he was putting a 528 stroker hemi in it, so it might have them "now" as I've not seen him in a while.