bigger rear drums

That government stuff is weird. The truck was a '75 D100 shortbed wide side. 318, 727, power disc brakes, manual steering, A/C, 9 1/4", 3.55 w/sure grip & 11" brakes, 16" wheels. Oh, and of course that cool pastel green exterior w/ white interior.
I converted the truck to a 360, 904, power steering, 8 3/4 3.23 w/sure grip, black interior, white exterior, lowered. sold it 8 years ago.
I still have the original 318 and the 727 is in my '65 Valiant I drag race.