Original Wheel and Tyre size Duster?

70 Buster 340 said
1974
From memory as the new car prep guy at a Chrysler Plymouth dealer in 1974

318 cars = DR78-14 WW on 14x5.5 plain steel wheels. First year for radials
360 cars = E70x14 GoodYear RWL on 14x5.5 rally wheels

No worries thankyou, i cant believe it was such a hard google search